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Equipment Discussions >> ATM, Optics and DIY Forum

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Post your home made scope
      #5636673 - 01/22/13 11:20 AM

As the refractor and reflector forums both have post photos of, threads, I thought it would be fun to see everyones ATM made scopes.

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gpelf
sage


Reged: 12/28/11

Loc: Kentucky
Re: Post your home made scope new [Re: droid]
      #5636777 - 01/22/13 12:20 PM

Here is a link to my 8" F8.6 that is about 50% complete.
Link

Greg


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: droid]
      #5636784 - 01/22/13 12:23 PM Attachment (373 downloads)

here's my first...

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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: Pinbout]
      #5636790 - 01/22/13 12:27 PM

my first atm frac...



and first dob...



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André Heijkoop
member
*****

Reged: 05/02/10

Re: Post your home made scope new [Re: droid]
      #5636809 - 01/22/13 12:35 PM Attachment (249 downloads)

Here is mine:
24" f3.7 truss Dobson
The text is mainly in Dutch, but each slide has a self-explaining picture.


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: André Heijkoop]
      #5636818 - 01/22/13 12:41 PM

Quote:

Here is mine:
24" f3.7 truss Dobson





that's an awesome scope.

I can't see your site cause my browser doesn't support html 5.


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starman345
Wait, I'm Thinking
*****

Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: Pinbout]
      #5636833 - 01/22/13 12:47 PM

Dang, that is one NICE 24" scope

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André Heijkoop
member
*****

Reged: 05/02/10

Re: Post your home made scope new [Re: Pinbout]
      #5636850 - 01/22/13 12:54 PM

Quote:

I can't see your site cause my browser doesn't support html 5.



What browser do you use?


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kfrederick
Carpal Tunnel
*****

Reged: 02/01/08

Re: Post your home made scope new [Re: André Heijkoop]
      #5636918 - 01/22/13 01:32 PM Attachment (426 downloads)

A ball in a can mount

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: André Heijkoop]
      #5636921 - 01/22/13 01:33 PM

Nice slidee show, including the bloopers was cool.

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mconnelley
sage


Reged: 03/14/06

Loc: Hilo, HI
You asked for it... new [Re: droid]
      #5637000 - 01/22/13 02:12 PM Attachment (432 downloads)

Hello:

Here's a picture of the last scope I made. It's a 20" f/4 on a ball mount.

Cheers
Mike


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StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: You asked for it... new [Re: mconnelley]
      #5637049 - 01/22/13 02:34 PM Attachment (335 downloads)

An 8-in f/4.1 newt finished a couple of years ago.

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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: You asked for it... new [Re: mconnelley]
      #5637054 - 01/22/13 02:35 PM

Quote:

Here's a picture of the last scope I made. It's a 20" f/4 on a ball mount.






do you collimate that from the front?


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StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: You asked for it... new [Re: StarStuff1]
      #5637056 - 01/22/13 02:36 PM Attachment (314 downloads)

And a 4-in f/4 refractor using a bino objective.

And, of course, my avatar 6-in f/10.


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Jarad
Postmaster
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Reged: 04/28/03

Loc: Atlanta, GA
Re: You asked for it... new [Re: Pinbout]
      #5637080 - 01/22/13 02:51 PM

Looks to me like he has the collimation bolts sticking up at the sides of the mirror - I think you can see one of them in the photo near the top edge of the mirror.

Similar design as the Portaball.

Jarad


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MessiToM
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Huntingdon PA
Re: You asked for it... new [Re: StarStuff1]
      #5637084 - 01/22/13 02:52 PM

My first ATM around a Coulter 17.5" F4.45



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MessiToM
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Huntingdon PA
Re: Post your home made scope new [Re: kfrederick]
      #5637087 - 01/22/13 02:54 PM

Quote:

A ball in a can mount



ingenious lol


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BarabinoSr
Pooh-Bah
*****

Reged: 11/17/05

Loc: Slidell La
Re: Post your home made scope new [Re: droid]
      #5637214 - 01/22/13 04:00 PM Attachment (294 downloads)

Here's my 4.5" f/10 Jaegers Refractor on its CG-5 EQ Head ,just after its completion. G

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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: BarabinoSr]
      #5637260 - 01/22/13 04:18 PM Attachment (320 downloads)

This is a 5" f12 Istar on a Berry mount.

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StarStuff1
Post Laureate
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Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: Post your home made scope new [Re: plyscope]
      #5637274 - 01/22/13 04:22 PM

Nice!

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Sean Cunneen
Let Me Think
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Reged: 08/01/07

Loc: Blue Island Illinois
Re: Post your home made scope new [Re: StarStuff1]
      #5637297 - 01/22/13 04:35 PM Attachment (338 downloads)

OMG. But they are ALL home made! How about my latest:

8"f16 Classical Cassegrain with Optics and tube by Tom M. (Niteskystargazer) rebuilt by yours truly on a Criterion Mount also rebuilt by your truly:


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barieb
member
*****

Reged: 10/30/04

Re: Post your home made scope new [Re: Sean Cunneen]
      #5637368 - 01/22/13 05:14 PM

Dobsonian stand for an 8" Celestron

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barieb
member
*****

Reged: 10/30/04

Re: Post your home made scope new [Re: barieb]
      #5637371 - 01/22/13 05:16 PM Attachment (264 downloads)

Didn't get the picture

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barieb
member
*****

Reged: 10/30/04

Re: Post your home made scope new [Re: barieb]
      #5637377 - 01/22/13 05:17 PM Attachment (234 downloads)

8" two pole dob

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barieb
member
*****

Reged: 10/30/04

Re: Post your home made scope new [Re: barieb]
      #5637379 - 01/22/13 05:18 PM Attachment (228 downloads)

Remake of 8" Starhopper

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barieb
member
*****

Reged: 10/30/04

Re: Post your home made scope new [Re: barieb]
      #5637381 - 01/22/13 05:19 PM Attachment (177 downloads)

Starhopper put away

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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: Sean Cunneen]
      #5637388 - 01/22/13 05:23 PM Attachment (303 downloads)

My home brew of over 30 years in the making and evolving. Now currently an Istar 10" F/11 R30. The Jaegers 6" F/8 has a dual function of serving as a 38x finderscope and a widefield DSO locater. My philosophy is if I can't "detect" it in the 6" scope it's not going to show in the 10" because of the much higher magnifications and narrower field of view. But remember I'm in the urban city so my skies are shall we say.....rather milky? But double stars and planets.....whoooo weeee! Mike

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jasonharris
sage


Reged: 09/16/06

Re: Post your home made scope new [Re: StarStuff1]
      #5637449 - 01/22/13 05:52 PM Attachment (270 downloads)

I think the old forums may have had a thread like this..

Here are the two scopes I have built, a 16" dob which I only have one photo handy. Guy grunting behind it is not me

The other is the 12.5" rc I did a little while back.


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jasonharris
sage


Reged: 09/16/06

Re: Post your home made scope new [Re: jasonharris]
      #5637450 - 01/22/13 05:53 PM Attachment (189 downloads)

And the RC.

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Gary Fuchs
Pooh-Bah
*****

Reged: 05/22/06

Loc: Easton, PA, USA
Re: Post your home made scope new [Re: droid]
      #5637496 - 01/22/13 06:23 PM

My 4.25" Delmarva Schief...



Gary


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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: Post your home made scope new [Re: Gary Fuchs]
      #5637532 - 01/22/13 06:49 PM

Remake of my Z12 next to my Z10.



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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: cpr1]
      #5637558 - 01/22/13 07:01 PM Attachment (194 downloads)

my rehab'ed truss. [dragons represent the heavens so I thought its not incongruent]

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: André Heijkoop]
      #5637569 - 01/22/13 07:11 PM Attachment (253 downloads)

My Little scope was made by the late
John Poaska of the kalamazoo Astronomical Ssociety

It is a 52 WWII bino lens.

Alan O.


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: StarWrangler]
      #5637571 - 01/22/13 07:13 PM Attachment (171 downloads)

Another view
of the John Paska scope

Alan O.


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StarDusty
sage


Reged: 10/02/07

Loc: Parsippany, NJ
Re: Post your home made scope new [Re: StarStuff1]
      #5637914 - 01/22/13 10:39 PM Attachment (267 downloads)

You can see the rest:

16" Dob
13" Dob
6" f/5.6
6" f/12

On my website listed below


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mconnelley
sage


Reged: 03/14/06

Loc: Hilo, HI
Re: You asked for it... new [Re: Pinbout]
      #5638184 - 01/23/13 02:00 AM

Hello:

For my 20" f/4 ballscope, the collimation is indeed done from the front. The silvery bits you can see around the mirror are the face clips that keep the mirror from falling out. I can use the screws that attach the top ring to the truss poles to effectively lengthen or shorten the truss poles. Depending on your point of view, this either A) tilts the ball relative to the truss or B) tilts the truss relative to the ball. Either way, I can get it so that the optical axis of the primary mirror goes through the middle of the focuser. Since the truss is a hexapod, I could also use the truss screws to tilt the secondary. However, for the sake of simplicity, I use the usual collimation screws on the back of the secondary to tilt it so that the truss screws are just for primary mirror collimation.

Cheers
Mike


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dave brock
professor emeritus


Reged: 06/06/08

Loc: Hamilton, New Zealand
Re: Post your home made scope new [Re: jasonharris]
      #5638194 - 01/23/13 02:20 AM

Quote:

Here are the two scopes I have built, a 16" dob which I only have one photo handy. Guy grunting behind it is not me The other is the 12.5" rc I did a little while back.




As I know Jason I thought I would point out that the guy in the rc pic is not him either

Dave


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dave brock
professor emeritus


Reged: 06/06/08

Loc: Hamilton, New Zealand
Re: Post your home made scope new [Re: dave brock]
      #5638196 - 01/23/13 02:25 AM Attachment (192 downloads)

One of my early efforts, an 8" Dob with optional folding stand.

Dave


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neo
Carpal Tunnel
*****

Reged: 02/12/08

Loc: Iasi, Romania
Re: Post your home made scope new [Re: dave brock]
      #5638303 - 01/23/13 06:48 AM Attachment (212 downloads)

My little Uberfractor I made a while ago out of a Rodenstock lens. Very nice flat field RFT which should be very good for wide field imaging. The quick and dirty Alt-Az mount seats on an old eq3 tripod tuned also for better stability.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: dave brock]
      #5638307 - 01/23/13 06:52 AM Attachment (214 downloads)

Mine is home made, though not by myslef, but rather by a Ohio ATM named Jason Hissong
http://www.cloudynights.com/ubbthreads/showflat.php?Cat=0&Board=atm&N...


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Jim Curry
Pooh-Bah
*****

Reged: 10/29/07

Loc: STL
Re: Post your home made scope new [Re: dave brock]
      #5638309 - 01/23/13 06:54 AM Attachment (218 downloads)

4" f/12 Istar, powder coated, baffled, AP focuser.
Jim


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NHRob
Post Laureate
*****

Reged: 08/27/04

Loc: New Hampshire
Re: Post your home made scope new [Re: Jim Curry]
      #5638320 - 01/23/13 07:18 AM

Nice. How are the optics on that 4" Istar?

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John Jarosz
Astro Gearhead
*****

Reged: 04/25/04

Loc: Fairfax, Iowa
Re: Post your home made scope new [Re: NHRob]
      #5638401 - 01/23/13 08:31 AM Attachment (185 downloads)

Here are the 3 scopes in my sig line

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tim53
Postmaster
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Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: John Jarosz]
      #5638682 - 01/23/13 11:05 AM

This was my first home-made scope. No jive!

8" f/6 Springfield Newtonian, 1981 RTMC Merit award winner.



-Tim


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: tim53]
      #5638712 - 01/23/13 11:20 AM

Some beautiful scopes so far. to all

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VĂ­ctor MartĂ­nez
sage


Reged: 02/05/07

Loc: Cadiz - Spain
Re: Post your home made scope new [Re: droid]
      #5638733 - 01/23/13 11:31 AM

Here the mine, 16" f5



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idp
sage


Reged: 08/21/09

Loc: New Haven, CT
Re: Post your home made scope new [Re: droid]
      #5638735 - 01/23/13 11:33 AM

Awesome thread, I learned a lot just by scrolling down.

Mike, I fell in love with your ball mount but frankly, how hard is it to collimate with the trusses instead of the primary mirror?


Ivano


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: VĂ­ctor MartĂ­nez]
      #5638831 - 01/23/13 12:28 PM

Victor , like the 16" f/5 on the focuser board, burned in???

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VĂ­ctor MartĂ­nez
sage


Reged: 02/05/07

Loc: Cadiz - Spain
Re: Post your home made scope new [Re: droid]
      #5638910 - 01/23/13 01:09 PM

Andy, is a black vinyl adhesive

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: John Jarosz]
      #5638938 - 01/23/13 01:25 PM

Cool,

The one open Scope reminds me of D. Dillworths Dall Kirkham Folding scope that was in Sky & Telescope some years ago.

Alan O.


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mconnelley
sage


Reged: 03/14/06

Loc: Hilo, HI
Collimating using the truss new [Re: idp]
      #5639021 - 01/23/13 02:36 PM

Hello:

Collimating the ballscope using the trusses is fairly easy, but a little different than a 'regular' Newtonian. On the plus side, there is no running back and forth since everything is done at the top end. If I get set up before dark, I use a regular Cheshire collimating tool to collimate the secondary and then the primary in the usual way, and that gets me pretty close. Then I look at a star to zero out the coma by adjusting the truss. I look at the star out of focus, and stick my hand into the beam and move it around until the shadow of my hand is on the 'thin' side of the donut (out of focus image of the star). I then know which way I need to move the truss. After a few iterations, the coma has been taken care of. Overall, I'd say that it's no harder than collimating a 'regular' f/4 Newtonian. The collimation seems to hold well throughout a night.

The reason I put the collimation at the top was to allow me to put the mirror farther back into the ball, thus helping balance. The hardware, plus room to allow for the adjustment, would have taken up about 1" of space back there. Also, since the mirror doesn't move relative to the ball, the mirror edge supports are glued to the inside of the ball, and aren't attached to the part of the mirror cell with the triangles and bars. So, from a certain point of view, the ball is also the frame for the mirror cell.

Cheers
Mike


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philipdo
sage


Reged: 12/06/06

Loc: Flanders, Belgium, Europe
Re: Post your home made scope new [Re: StarWrangler]
      #5639066 - 01/23/13 03:10 PM Attachment (216 downloads)

My trusted 200 mm F/D 20 Kutter Catadioptric Schiefspiegler. Wood & aluminum construction.

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idp
sage


Reged: 08/21/09

Loc: New Haven, CT
Re: Collimating using the truss new [Re: mconnelley]
      #5639071 - 01/23/13 03:11 PM

Very interesting, thank you. You says that the collimation holds through the night, does it mean that you'll have to repeat it on the following observing night? Even if you do not disassemble the the telescope?

Ivano


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roscoe
curmudgeon
*****

Reged: 02/04/09

Loc: NW Mass, inches from VT
Re: Post your home made scope new [Re: philipdo]
      #5639780 - 01/23/13 11:35 PM Attachment (188 downloads)

Here's my 60mm f/16.... a Carton objective, long tube made by splicing together two tubes, vintage .965 focuser, dew shield made from a fire extinguisher, Meade alt-az mount found in a customer's basement, used aluminum tripod, now replaced with a home-made cherry wood model.

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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Post your home made scope new [Re: roscoe]
      #5639806 - 01/23/13 11:55 PM Attachment (155 downloads)

My redone rockerboard for my Z12. Shortened, lightened, prettified.

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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Post your home made scope new [Re: kfiscus]
      #5639811 - 01/23/13 11:59 PM Attachment (154 downloads)

Side view of same. M31 and friends? Top hole (M32) is functional for C5 solar viewing scope, bottom hole (M110) is handle. Rides on dedicated Atomic EQ platform.

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Jim Curry
Pooh-Bah
*****

Reged: 10/29/07

Loc: STL
Re: Post your home made scope new [Re: NHRob]
      #5639823 - 01/24/13 12:07 AM

Rob:

As one critical observer noted "that the CA for an 4" f/12 was about as good as it gets. The rings were concentric and perfectly shaped" and " this looks lens like it was turned on a lathe, perfect star test images and as good as a 4" achromat can be. He was even speculating that maybe the glass was special and that this wasn't a Fraunhofer design to get such good correction."

It doesn't get better in a 4" than what this scope puts up. I built up a 6" f/12 Istar and I say the same thing.

Jim


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Crayfordjon
Vendor - Zerochromat
*****

Reged: 06/17/09

Loc: UK
Re: Post your home made scope new [Re: Jim Curry]
      #5639991 - 01/24/13 03:36 AM Attachment (232 downloads)

Six inch refractor made from cat food tins and plastic drain pipes, used for solar imaging.

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Bob Myler
Carpal Tunnel
*****

Reged: 05/18/06

Loc: St Louis, MO
Re: Post your home made scope new [Re: Crayfordjon]
      #5640971 - 01/24/13 04:03 PM

Quote:

Six inch refractor made from cat food tins and plastic drain pipes, used for solar imaging.




Friskies, Fancy Feast - or Tender Vittles?


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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: Bob Myler]
      #5641124 - 01/24/13 05:37 PM

here is mine I will finish it soon



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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: titanio]
      #5641137 - 01/24/13 05:46 PM

And this is my Super apo telescope I make with Russian optic



Uploaded with ImageShack.us


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Crayfordjon
Vendor - Zerochromat
*****

Reged: 06/17/09

Loc: UK
Re: Post your home made scope new [Re: titanio]
      #5641925 - 01/25/13 04:16 AM Attachment (199 downloads)

Yeah! I supply the cat food tins, you gotta problem with that pal!

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astrobeast1
super member


Reged: 09/28/10

Loc: leicester england
Re: Post your home made scope new [Re: Crayfordjon]
      #5641956 - 01/25/13 05:24 AM Attachment (259 downloads)

This is my little pair of binocular's--the mirror,s are 635mm

Edited by astrobeast1 (01/25/13 05:27 AM)


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VĂ­ctor MartĂ­nez
sage


Reged: 02/05/07

Loc: Cadiz - Spain
Re: Post your home made scope new [Re: astrobeast1]
      #5641993 - 01/25/13 06:42 AM

go gadget!

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: astrobeast1]
      #5642003 - 01/25/13 06:57 AM

where are the eps? thats super cool

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Ravenous
professor emeritus


Reged: 11/14/09

Loc: UK
Re: Post your home made scope new [Re: astrobeast1]
      #5642010 - 01/25/13 07:03 AM

I love the winch and the blue string! (For elevation/ALT control?)

Looks like what I'd call a B&Q scope!


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: astrobeast1]
      #5642233 - 01/25/13 09:57 AM

Way cool Astrobeast,

Looks a touch like Steampunk which I like.

is it hard to collimate?


Alan O.


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Crayfordjon
Vendor - Zerochromat
*****

Reged: 06/17/09

Loc: UK
Re: Post your home made scope new [Re: StarWrangler]
      #5642242 - 01/25/13 10:01 AM Attachment (228 downloads)

After I built my six inch scope from cat food tins I gained enough exprience to try a bigger scope, as you do.

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Ksearles62
member


Reged: 11/26/11

Loc: Medical Lake WA
Re: Post your home made scope new [Re: Crayfordjon]
      #5642469 - 01/25/13 12:17 PM Attachment (241 downloads)

Here is my 10" f5. Homemade from plywood and aluminum.

Edited by Ksearles62 (01/25/13 12:47 PM)


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Ksearles62]
      #5642548 - 01/25/13 01:04 PM

Kenny thats just purty , great job

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astrobeast1
super member


Reged: 09/28/10

Loc: leicester england
Re: Post your home made scope new [Re: droid]
      #5642891 - 01/25/13 04:09 PM Attachment (218 downloads)

Hi Victor --Droid --Ravenous---starwrangler-

my scope with two 635mm mirrors is called "Hexy" (the tubes are 16 sided=Hexadecagon shapes ) -it is F4.7--has fourteen, motors to control all aspects of Hexy's movement's ,pushbutton control box in eyepiece area , it has motorised sliding focusers/diagonal's ,-both tubes are pivoted to swing in 90 degree opposing direction,s to allow merging at the eyepiece,s
.
The alt/az is controlled by motors and special setting circles --the colour scheme is Black blue & Gold
(martian skies blue)
Have melted and polished my own mirror's The whole shebang including the aluminised mirrors has cost Ł1500.00.
Hexy is roughly equivalent to a 36 inch mirror due to the binocular format .
Collimation is a snip=very easy.
this is an old pic. but the eyepiece/ tertiaries are where the 50mm tube is coming out of the cages . Hexy is so well balanced on big bearings-I can literally move Her round and up and down with one finger .
Hope you all like her.

Edited by astrobeast1 (01/25/13 04:15 PM)


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Mirzam
Post Laureate
*****

Reged: 04/01/08

Loc: Lovettsville, VA
Re: Post your home made scope new [Re: astrobeast1]
      #5642945 - 01/25/13 04:37 PM Attachment (241 downloads)

Here's a shot of my 14" travel scope in Chile, not too far from Cerro Tololo observatory.

JimC


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Mirzam]
      #5643144 - 01/25/13 06:47 PM

Jim, nice scope , I still ,sometimes ,wonder at the fact that such a large scope is considered transportable , only a genration ago such a thing would have been impossible.

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idp
sage


Reged: 08/21/09

Loc: New Haven, CT
Re: Post your home made scope new [Re: astrobeast1]
      #5643149 - 01/25/13 06:50 PM

Quote:

This is my little pair of binocular's--the mirror,s are 635mm




Awesome!!!!


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Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Post your home made scope new [Re: idp]
      #5643757 - 01/26/13 03:20 AM Attachment (208 downloads)

Wow!! superb scope builds everyone.

Here's my my build using a Carton 100mm f/13 lens.
Scope parts are made from M.D.F. board and plastic soil pipe.


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Rutilus]
      #5644147 - 01/26/13 10:46 AM

Nice scope Rutilus love the cage that holds the scope.
How does the Carton lens perform?


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Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Post your home made scope new [Re: droid]
      #5644825 - 01/26/13 05:59 PM Attachment (172 downloads)

Andy - Since building and testing the Carton, I've found it to be a superb lens.

Racking both sides of focus I get a near identical star pattern with just the very
slighest hint of over-correction.
In focus, I get a tiny trace of C.A. on stars such as Vega and Sirius. Since the start of this year,
I've been able to observe Sirius B four times now, with Sirius being only 18 degrees altitude, the
amount of C.A. around the star is extremely tiny.

I did side by side testing with my Takahashi TSA-102 and a friends excellent FS-102.
With Jupiter I could not see a difference between all three scopes in terms of the planetary detail
observed. The Carton showed the festoons, great red spot, oval BA and rifts in the belts, every bit
as good as the Tak scopes.

The Carton is a fantastic double-star scope, again being the equal of the Tak's. I actually found
the F star in the Trapezium easier to see with the Carton.

The sharpness and contrast of the lens is excellent, with the albedo features and 4 to 5 bright craterlet
markings being easily visible within the Lunar crater Plato. On the night of a recent Full moon, I could
easily see different colouration hue's on the lunar surface.

I have been so pleased by this scope, that I have now sold my TSA-102, and used to the money to
fund the building of a Istar 6" f/15.

Here's a picture of the M.D.F. lens cell.

Edited by Rutilus (01/26/13 06:03 PM)


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Tavi
super member


Reged: 10/11/09

Loc: Romania, EU
Re: Post your home made scope new [Re: Rutilus]
      #5645590 - 01/27/13 08:16 AM

Hi!
There is all my home made equipment: 8" F/15 classical cassegrain, the 70 F/4 RFT ("The Steam Locomotive") and the Fraunhofer refractor 80mm F/11.25 and 6x30 finder, all suported by the heavy piston AZ mount on a cherry wooden tripod:



Uploaded with ImageShack.us

The optical elements are not my work,they are bought new or second hand. The details of constructions are presented on my threads.

Edited by Tavi (01/27/13 08:23 AM)


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NHRob
Post Laureate
*****

Reged: 08/27/04

Loc: New Hampshire
Re: Post your home made scope new [Re: Tavi]
      #5646014 - 01/27/13 12:55 PM

beautiful scopes! How do you like your classical Cass?

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: NHRob]
      #5646037 - 01/27/13 01:08 PM

Rob I was hoping you would see this thread, seen your ATM work in the past.

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NHRob
Post Laureate
*****

Reged: 08/27/04

Loc: New Hampshire
Re: Post your home made scope new [Re: droid]
      #5646467 - 01/27/13 05:16 PM

Love these kind of threads!

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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: droid]
      #5646776 - 01/27/13 07:39 PM Attachment (280 downloads)

Here's my 14" equatorial Newtonian. Ever since I bought it as a Dob in 2001 I've been repeatedly rebuilding and remodeling it, trying out new ideas. The most unusual features of the current version are:
- a rotating secondary cage with seven focusers so I can change eyepieces in 2 seconds;
- the entire tube rotates on a single Lazy Susan;
- a truss-style mirror box with a "naked mirror" for faster cooling;
- vibration dampers (when I added the 7-focuser cage I doubled the weight of the tube without making the mount stiffer, so it developed a vibration problem);
- a fork equatorial mount with a pyramid shaped polar axis;
- low friction bronze or roller bearings carry all the weight, with additional friction provided by polyethylene pads against aluminum;
- two concentric polar axes using a Lazy Susan at the north end. A motor drives the inner ring of the Lazy Susan, while the outer ring is hand driven and rests against roller bearings (this was by far the hardest part!)


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astrobeast1
super member


Reged: 09/28/10

Loc: leicester england
Re: Post your home made scope new [Re: Dick Jacobson]
      #5647361 - 01/28/13 02:35 AM

Hi Dick, I had seen just your secondary cage in another post, and thought it was an amazing concept and absolutely unique as far as I,m aware .Stunning piece of kit that .
Is your twenty the same ?

admiring Dan


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: astrobeast1]
      #5647585 - 01/28/13 08:34 AM

Quote:

Hi Dick, I had seen just your secondary cage in another post, and thought it was an amazing concept and absolutely unique as far as I,m aware .Stunning piece of kit that .
Is your twenty the same ?

admiring Dan



Thanks, I am currently rebuilding the 20" along similar lines, except it will not have the rotating secondary cage. The rotating cage would be difficult to handle at that size and would be difficult to integrate with my periscope accessory. My original 20" build is described at 20" equatorial.


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Dick Jacobson]
      #5647655 - 01/28/13 09:30 AM

Dick your 20 inch is phenominal, I hope youll post it here too.
You havent gone larger have you?


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PrestonE
Carpal Tunnel
*****

Reged: 04/29/05

Loc: San Miguel de Allende,Mexico
Re: Post your home made scope new [Re: droid]
      #5647908 - 01/28/13 11:43 AM Attachment (213 downloads)

Hi Everyone,

Here is a pic of our 20 inch RC about to leave our old home in Houston.

It still is not at it's permanent home in Granite Gap, as they still do not have all of the utilities in and ready

We have now been waiting for over 3 years

Best Regards,

Preston

Edited by PrestonE (01/28/13 11:48 AM)


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: droid]
      #5648172 - 01/28/13 01:25 PM

Quote:

Dick your 20 inch is phenominal, I hope youll post it here too.
You havent gone larger have you?



I hope to have the rebuilt 20" done in a couple of months, then I'll post a picture. I've had thoughts of building something around 30" but it would most likely be an altazimuth on a built-in equatorial platform.


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: PrestonE]
      #5648444 - 01/28/13 03:10 PM

Preston,

Now that is what dreams are made of!!

Alan O.


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ccaissie
professor emeritus


Reged: 09/13/10

Loc: Whitefield, Maine
Re: Post your home made scope new [Re: StarWrangler]
      #5648517 - 01/28/13 03:37 PM Attachment (190 downloads)

8" f/7 flex mirror scope. Clouded up before optical judging, but Bill Kelley (rest his soul) checked it out and was thrilled.

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PrestonE
Carpal Tunnel
*****

Reged: 04/29/05

Loc: San Miguel de Allende,Mexico
Re: Post your home made scope new [Re: StarWrangler]
      #5648532 - 01/28/13 03:45 PM

Thanks Alan,

It is headed to the Texas Star Party again on the 5-12 of May and then

Hopefully Granite Gap will have everything ready...

What good are 7.4 mag skys, if there is no internet for operating remotely

Best Regards,

Preston


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piaras
scholastic sledgehammer


Reged: 01/26/09

Loc: Niagara Region
Re: Post your home made scope new [Re: PrestonE]
      #5648693 - 01/28/13 04:53 PM Attachment (168 downloads)

This one started as a 90 Red tube Coulter Odyssey 13.1 and I have gone from a split tube to 8 tube truss to this. The only parts original are the base and primary mirror. The mirror is next in 30-60 days, Zambuto will be in it's place. I will make a new base and bearings more appropriate for the scope.

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Tavi
super member


Reged: 10/11/09

Loc: Romania, EU
Re: Post your home made scope new [Re: droid]
      #5648821 - 01/28/13 05:48 PM

Thank you, Rob!
The classic cass is great! A little bit heavy (7.5Kg) but very strong, no need to recolimate frequently. The mirrors are from our local optician, Tavi Stanescu, the best choice for romanian ATM'ers. So, the sky is the limit of the beauty of its images.


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StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: Post your home made scope new [Re: Tavi]
      #5648890 - 01/28/13 06:22 PM Attachment (145 downloads)

One more small project finished last year. A 70mm f/13 achro in a Berry style tube and mount riding on a re-furbished WW II tripod made of oak, brass and bronze.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: piaras]
      #5649746 - 01/29/13 06:30 AM

piaras : nice rebuild(s) , do you have problems with the open design of your dob? mine is a six truss and is a nightmare near any bright lights at all.

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piaras
scholastic sledgehammer


Reged: 01/26/09

Loc: Niagara Region
Re: Post your home made scope new [Re: droid]
      #5649773 - 01/29/13 07:06 AM

I use a shroud to remove the stray light problems. I have used it without at times but making sure I have any light source at my back, and only a few times.
Pierre


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kfrederick
Carpal Tunnel
*****

Reged: 02/01/08

Re: Post your home made scope new [Re: piaras]
      #5649878 - 01/29/13 09:00 AM Attachment (158 downloads)

A 20 inch f5 newt with a 20 inch f8 CHief

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Sean Cunneen
Let Me Think
*****

Reged: 08/01/07

Loc: Blue Island Illinois
Re: Post your home made scope new [Re: kfrederick]
      #5650124 - 01/29/13 11:42 AM Attachment (161 downloads)

My latest... Still working on the dewshield but the rest is put together. This is my 3" f15.3 Brandon Refractor on an Edmund mount and Dietzen Tripod. The focuser is a custom brass Crawmach. I consider it a period-repro-franken scope.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Sean Cunneen]
      #5650228 - 01/29/13 12:40 PM

Sean, looks a bit like an Edmund mount, the counter weight looks like the one my 6inch f/8 mount had.

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Sean Cunneen
Let Me Think
*****

Reged: 08/01/07

Loc: Blue Island Illinois
Re: Post your home made scope new [Re: droid]
      #5650237 - 01/29/13 12:44 PM Attachment (136 downloads)

Yep, it sure is. Great heavy iron construction, built like a tank. Undermounted my 6" reflector, but for this job, it's a cinch!

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: PrestonE]
      #5650274 - 01/29/13 01:01 PM


Have fun at Texas Preston,


Alan O.

Quote:

Thanks Alan,

It is headed to the Texas Star Party again on the 5-12 of May and then

Hopefully Granite Gap will have everything ready...

What good are 7.4 mag skys, if there is no internet for operating remotely

Best Regards,

Preston




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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: StarWrangler]
      #5650616 - 01/29/13 03:42 PM

Here is my home made 10" travel scope...

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1786.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1796.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1784.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1773.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1775.jpg

cs
Markus


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astrobeast1
super member


Reged: 09/28/10

Loc: leicester england
Re: Post your home made scope new [Re: etalon]
      #5650626 - 01/29/13 03:48 PM

Markus,
that is a wonderful travel scope being a 10 inch and all inside a backpack--Amazing --I really like it

Dan


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gravitino
sage
*****

Reged: 04/28/09

Loc: Evanston, IL
Re: Post your home made scope new [Re: astrobeast1]
      #5650631 - 01/29/13 03:49 PM

Here are my 12.5" (Equinox) and my 22" (Cosmos Mariner) together this fall.



Clear skies,
-- Shane


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starman345
Wait, I'm Thinking
*****

Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: etalon]
      #5651025 - 01/29/13 07:45 PM

Quote:

Here is my home made 10" travel scope...




Beautiful telescope Markus!


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starman345
Wait, I'm Thinking
*****

Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: starman345]
      #5651027 - 01/29/13 07:46 PM

Awesome Telescopes Shane, love the color scheme.

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dave brock
professor emeritus


Reged: 06/06/08

Loc: Hamilton, New Zealand
Re: Post your home made scope new [Re: kfrederick]
      #5651529 - 01/30/13 01:57 AM

Quote:

A 20 inch f5 newt with a 20 inch f8 CHief




Kevin, I think you need to check the coating on your CHief

Dave


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CosmoJoe
member
*****

Reged: 10/03/12

Loc: Gilbert, Arizona
Re: Post your home made scope new [Re: etalon]
      #5651571 - 01/30/13 03:12 AM

Quote:

Here is my home made 10" travel scope...

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1786.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1796.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1784.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1773.jpg

http://www.deep-sky-images.de/albums/userpics/10002/IMG_1775.jpg

cs
Markus




I am really impressed with your counterweight spring system. It's a pretty clever little piece of engineering. I love that scope and I wish I had one just like it so I could hike deep into the Sonoran and set up.


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: CosmoJoe]
      #5651867 - 01/30/13 09:23 AM

it's very similar to the litescope

I made a 3d model of a 12.5" litescope in sketchup.

Edited by Pinbout (01/30/13 09:26 AM)


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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: Pinbout]
      #5652060 - 01/30/13 11:07 AM

Thanks guys for your kind words! On my homepage you can find some more pics...

You don´t need any tools to set it up or to collimate it except your hands (and a collimating laser)...
The complete scope wight is 10kg incl. eye piece, ready to work. So you can take it with in a air plane...

@Danny: I saw a litescope prototype some years ago, before they start to produce them, and there were some details, which would not work very well. Maybe they have fixed those things now, I don´t know. But this is my own concept...

cs
Markus


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starman345
Wait, I'm Thinking
*****

Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: etalon]
      #5652143 - 01/30/13 11:50 AM Attachment (147 downloads)

Just finished in the last couple of weeks. 14" dob with a Hubble Optics primary.

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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: etalon]
      #5652245 - 01/30/13 12:41 PM

Quote:

Maybe they have fixed those things now, I don´t know. But this is my own concept...






and it seems very well engineered.


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Pinbout]
      #5653643 - 01/31/13 06:00 AM

Nice build Brian, the sliver moon bearings seem to be popping up more now adays.Gonna stain or paint?

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starman345
Wait, I'm Thinking
*****

Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: droid]
      #5653727 - 01/31/13 07:29 AM

I don't have much luck with stains on plywood, probably because I just don't have enough experience with it. The secondary cage and mirror box have polyurethane on them, nothing else and I think I'll do the same with the rocker box and ground board. I kinda like the look of baltic birch with poly on it.

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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: Post your home made scope new [Re: starman345]
      #5653734 - 01/31/13 07:33 AM

Very nice build Brian! Well done.

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gmartin02
scholastic sledgehammer
*****

Reged: 04/11/05

Loc: Santa Clarita, CA
Re: Post your home made scope new [Re: droid]
      #5654672 - 01/31/13 04:49 PM Attachment (146 downloads)

Frankenscope

My brother picked up a Meade DS 114 for free at a yard sale - it had sat outside for several years uncovered, so the mirrors were ruined and everything was rusted. The only thing salvageable were the tube & tube rings, mirror cell, and secondary holder & spider.

I got a 4" f/6 Carton primary mirror for $30 from CN classifieds, had an old Orion 1" secondary sitting around that fit the existing secondary holder perfectly, and also had an old JMI DX3 focuser laying around that I wasn't using.

I cut the tube down for the shorter focal length, drilled the focuser & other holes, then sanded/primed, & painted the tube "TeleVue green" . I replaced all of the rusty nuts, bolts, and springs and put it back together.

It works pretty good - I plan to mount it as a "super finder" outboard on the altitude axis on my 12.5" Dob.

Greg


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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5655071 - 01/31/13 09:00 PM Attachment (172 downloads)

This is a 8" f11 with a permanent outdoor pipe mount.

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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5655105 - 01/31/13 09:21 PM Attachment (139 downloads)

This is a 12" cassegrain with f3 primary and f15 overall. A diagonal between the primary and secondary mirrors sends the image to the focuser on the side of the 'tube.'

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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5655117 - 01/31/13 09:30 PM Attachment (154 downloads)

8" f6 dob. made of discarded dining room table and other scraps.

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starman345
Wait, I'm Thinking
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Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: Larry Silvestri]
      #5655124 - 01/31/13 09:33 PM

Nice scopes Larry, love the cassegrain

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StarStuff1
Post Laureate
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Re: Post your home made scope new [Re: Larry Silvestri]
      #5655127 - 01/31/13 09:34 PM

Larry, that is a super good looking pipe mount!
But what are the straps going below the deck for? A counterweight?


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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5655141 - 01/31/13 09:47 PM Attachment (179 downloads)

12" f6 Newtonian on my very old Starliner mount. Rotating rings are 14" lazy-suzans. This is my best performing scope.

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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: StarStuff1]
      #5655199 - 01/31/13 10:24 PM

Quote:

Larry, that is a super good looking pipe mount!
But what are the straps going below the deck for? A counterweight?



Thank you! The 8" f11 stays outside all the time, so the straps fasten a canvas tarp to keep the weather off when the scope is not in use.


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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: starman345]
      #5655266 - 01/31/13 11:00 PM

Quote:

Nice scopes Larry, love the cassegrain




Thank you! I have spent a lot of time on it. I re-figured the primary a few times, and made a few new secondaries. Each iteration is a slight improvement. The f3 primary is demanding of surface accuracy and the whole system needs close alignment. I enjoy the challenge, but when I just want to look at stars, I'll use a long Newtonian.


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bremms
Carpal Tunnel
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Re: Post your home made scope new [Re: StarStuff1]
      #5655269 - 01/31/13 11:01 PM Attachment (174 downloads)

That is a nice collection Larry! Guess I can post my most recent. Poor camera pic from this evening.
103mm F15 Jaegers lens. I machined the lens cell, rear cell and the finder.


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: bremms]
      #5657621 - 02/02/13 06:28 AM

bemms; the down angle shot your scope makes it look like a 50mm table top scope,

After I read the size and make I did a double take


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Ed D
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Re: Post your home made scope new [Re: droid]
      #5657671 - 02/02/13 08:00 AM Attachment (168 downloads)

This is my 'Little Dipper' project, about one week into making sawdust. The composite pic shows the primary end and my method of mirror attachment, as well as the 'tube' next to me for scale. I just lightly pressed together the poles and parts to see how it was coming along. Oh, in case you're wondering, it's going to be a 6" f/8 using the old Synta mirror from Mighty Mouse, pictured in my avatar.

Thanks to my friend Brian for inspiring me to build this scope. I'm really enjoying the project.

Ed D

Edited by Ed D (02/02/13 08:08 AM)


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Ed D]
      #5657706 - 02/02/13 08:45 AM

Ed; nice.....I see the smaller holes in the mirror plate, assume theres a larger one on the bottem to allow air flow?

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Tom Clark
professor emeritus
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Loc: North of Deming, NM
Re: Post your home made scope new [Re: droid]
      #5657716 - 02/02/13 08:55 AM Attachment (188 downloads)

The Yard Scope, built in 1992. It is a 36" f/5. Photo taken at the '94 WSP.

The guys in the photo (L-R) are Jack Newton, Richard Berry, and Don Parker.


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Tom Clark
professor emeritus
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Reged: 11/14/07

Loc: North of Deming, NM
Re: Post your home made scope new [Re: Tom Clark]
      #5657721 - 02/02/13 08:59 AM Attachment (131 downloads)

A few of my travel scopes, including (L-R) a 12" f/6, 10" f6, 8" f/6, and a 24" f/4.5.

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tim53
Postmaster
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Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: Larry Silvestri]
      #5657912 - 02/02/13 11:02 AM

Quote:

This is a 8" f11 with a permanent outdoor pipe mount.




Beautiful! Was this scope or mount in S&T several years ago??

-Tim.


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Ed D
Carpal Tunnel
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Re: Post your home made scope new [Re: droid]
      #5657928 - 02/02/13 11:12 AM

Quote:

Ed; nice.....I see the smaller holes in the mirror plate, assume theres a larger one on the bottem to allow air flow?




Actually, not at this time, although the base plate is center punched should I want to cut a hole and maybe install a fan at a later date. Humidity is the biggest problem we have in the everglades and the open design and use of wood will immensely help. There is ample space between the base plate and the mirror cell for air flow. We get nice ocean breezes that keep the air moving, and we also use box fans to blow the mosquitoes off us which also circulates air around the scopes.

Ed D

Edited by Ed D (02/02/13 11:18 AM)


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Ed Jones
Carpal Tunnel
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Loc: Sin-sin-atti
Re: Post your home made scope new [Re: Ed D]
      #5658098 - 02/02/13 12:54 PM Attachment (143 downloads)

This is my 10 inch travel scope and my scaled up 16 inch.

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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: Tom Clark]
      #5658501 - 02/02/13 04:54 PM

Great pictures everyone, keep them coming!

It is wonderful to see Richard Berry in this thread, as well as Jack Newton and Don Parker, good picture Tom and great scopes.

Edited by plyscope (02/02/13 06:20 PM)


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ed_turco
Pooh-Bah
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Reged: 08/29/09

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Re: Post your home made scope new [Re: plyscope]
      #5658608 - 02/02/13 05:53 PM Attachment (140 downloads)

This is my 12" f/6 Newt that I made in 1997 and cost only $300. This was because I scavenged around for two years for stuff. Ground and polished by me.

And yes, this made S&T in 1998 or so. I sure was looking better and doing a lot better in 1997!


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: ed_turco]
      #5658709 - 02/02/13 06:37 PM

Ed; I remember that article fondly, I still have the magazine, folded open to the article, I was inspired to do something similiar, alas life etc got in he way.
Yes a much younger you, do you still have this scope?


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Dan Watt
scholastic sledgehammer
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Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Post your home made scope new [Re: droid]
      #5658800 - 02/02/13 07:47 PM

My 8" f4 newtonian astrograph.



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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Dan Watt]
      #5659142 - 02/02/13 11:45 PM

Dan , love it.....but man thats a mass of wires, lol.
Love the carbon fibre tube


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gcs111
member
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Reged: 05/01/07

Re: Post your home made scope new [Re: droid]
      #5659290 - 02/03/13 02:06 AM Attachment (173 downloads)

My girlfriend made this 10" f-6 scope...ground her mirror and it's a keeper.

Edited by gcs111 (02/03/13 02:14 AM)


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Chucky
sage
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Reged: 04/16/10

Loc: Dublin, Ohio
Re: Post your home made scope new [Re: gcs111]
      #5659428 - 02/03/13 07:05 AM

<< My girlfriend made this 10" f-6 scope >>

Tell her I'm impressed. Great job!!


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starman345
Wait, I'm Thinking
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Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: gcs111]
      #5659466 - 02/03/13 07:42 AM

Quote:

My girlfriend made this 10" f-6 scope...ground her mirror and it's a keeper.



I would say she is a keeper too, nice telescope


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: gcs111]
      #5659471 - 02/03/13 07:45 AM

And your gonna marry her when, lol

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Geo.
Carpal Tunnel
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Reged: 10/01/08

Loc: Upstate NY
Re: Post your home made scope new [Re: StarStuff1]
      #5659704 - 02/03/13 10:43 AM Attachment (143 downloads)

I took this C5 with a missing corrector in trade. It was in such nice condition I thought is deserved a second life. I found a Nexstar 5i with a beater tube on eBay for $75 and swapped the optics. This required removing the and exchanging the baffle tube as they were different diameters. Only Starbright OT C5 I know of.

Edited by Geo. (02/03/13 10:47 AM)


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: droid]
      #5659717 - 02/03/13 10:50 AM

Quote:

And your gonna marry her when, lol




I'd hold out till the 20" f3.5 dob with stervorcat goto.


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ed_turco
Pooh-Bah
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Reged: 08/29/09

Loc: Lincoln, RI
Re: Post your home made scope new [Re: droid]
      #5660164 - 02/03/13 03:06 PM Attachment (145 downloads)

Quote:

Ed; I remember that article fondly, I still have the magazine, folded open to the article, I was inspired to do something similar, alas life etc got in he way.
Yes a much younger you, do you still have this scope?




Andy, I sure do have that 12". Don't use it as much due to increasing disabilities. I've even shrunk 2.5" in height, but the telescope didn't.

I have a telescope that gets far more usage. Shown below.


Ed


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ed_turco
Pooh-Bah
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Reged: 08/29/09

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Re: Post your home made scope new [Re: ed_turco]
      #5660179 - 02/03/13 03:16 PM

Tell you about marrying a girl. My first wife hated astronomy, telescopes and all my friends. And then even me.

She took off and I got a divorce. Five years later I met a special girl who was so different. Not trusting my instincts, I taught her telescope making and insisted that she make one.

She did, and I married her two weeks later! Never regretted it in what now is almost 32 years. We married on Valentines Day, and now I have a granddaughter due on that same day -- our first.

Ed


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NHRob
Post Laureate
*****

Reged: 08/27/04

Loc: New Hampshire
Re: Post your home made scope new [Re: ed_turco]
      #5660206 - 02/03/13 03:31 PM

Awesome story Ed.
Congrats on being a Grand-Dad-to-be!


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Mirzam
Post Laureate
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Reged: 04/01/08

Loc: Lovettsville, VA
Re: Post your home made scope new [Re: NHRob]
      #5660214 - 02/03/13 03:37 PM

I think we have a new telescope testing technique...

The Turco Telescope Testing Technique (for prospective marriages)

Sounds like a great idea to me!

JimC


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Mxplx2
sage


Reged: 09/12/12

Loc: PA USA
Re: Post your home made scope new [Re: ed_turco]
      #5660289 - 02/03/13 04:23 PM

Quote:

Quote:

Ed; I remember that article fondly, I still have the magazine, folded open to the article, I was inspired to do something similar, alas life etc got in he way.
Yes a much younger you, do you still have this scope?




Andy, I sure do have that 12". Don't use it as much due to increasing disabilities. I've even shrunk 2.5" in height, but the telescope didn't.

I have a telescope that gets far more usage. Shown below.


Ed




Ed, this is the second time I saw your pic with the reflector and unusual counterweight only this time I got it. You don't have to chase the EP around. Brilliant!


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Mirzam]
      #5660574 - 02/03/13 06:58 PM

Quote:

I think we have a new telescope testing technique...

The Turco Telescope Testing Technique (for prospective marriages)

Sounds like a great idea to me!

JimC





I like it......


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ed_turco
Pooh-Bah
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Reged: 08/29/09

Loc: Lincoln, RI
Re: Post your home made scope new [Re: Mxplx2]
      #5660633 - 02/03/13 07:54 PM

The idea isn't that brilliant; it is a derivative of Porter's Springfield Mount.

For simplicity, I turned the design into an altazimuth Springfield that kept the eyepiece at a constant height. I have to revolve along with the eyepiece but this is far easier to do.

As the situation now stands, when I have to lower the eyepiece level when I am in a wheelchair, I'll cut the tripod legs to get that level!

I think that Porter would approve.

Edited by ed_turco (02/04/13 10:00 AM)


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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: ed_turco]
      #5660769 - 02/03/13 09:30 PM

Ed doesn't it hurt to have that CW crack you in the head?? Mike

Edited by mikey cee (02/03/13 09:31 PM)


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Datapanic
Post Laureate
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: Post your home made scope new [Re: mikey cee]
      #5660976 - 02/04/13 12:16 AM Attachment (164 downloads)

This is the Maynard Clark 8" f/8. I did not design nor build it, but somebody had it stored in a barn, in the back of an F-150 pickup truck outside of Tucson, AZ for years and years. The OTA was stored inside. I have been restoring it, very slowly for the past couple years - only one part left to be made and it will be finished. It has over 600 pieces to it. Not sure exactly when it was built, but it was pictured in the Oct 77 S&T and also received the RTMC Merit Award for Technical Excellence in 1980. You can read more about its restoration over in the Classics Forum here: Maynard Clark 8" f/8 If anyone knew Mr. Clark or remembers this scope, I sure would like to hear from you!

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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: ed_turco]
      #5660987 - 02/04/13 12:24 AM Attachment (89 downloads)

Quote:

The idea isn't that brilliant; it is a derivative of Porter's Springfield Mount.






I have something similar in my head but my counter weight hangs and uses the rocker box as a rail to glide on.


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alistairsam
journeyman


Reged: 10/03/10

Loc: Melbourne, Australia
Re: Post your home made scope new [Re: Pinbout]
      #5661159 - 02/04/13 06:07 AM Attachment (121 downloads)

Hi,
Here's my 10inch F4 Serrurier truss I recently completed.
Mirrors are from Orion Optics in the UK, trusses are carbon fibre, secondary spider is from guitar strings to minimize diffraction spikes, I've used guitar machine heads to adjust tension. Mirror Cell is a 6 point cell made from Aluminium square pipes rocking on a horizontal bolt held with clamps.


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Datapanic]
      #5661162 - 02/04/13 06:09 AM

Gosh Dan; just spent like 2 hours drooling over that restore, and it dead ended,
So how did it turn out? was the mirror as good as you had hoped.???
Absolutely gorgeous, the most beautiful restore Ive ever seen.


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alistairsam
journeyman


Reged: 10/03/10

Loc: Melbourne, Australia
Re: Post your home made scope new [Re: alistairsam]
      #5661163 - 02/04/13 06:14 AM Attachment (138 downloads)

Here's my home built Wooden Fork Mount.
It has a picaxe microcontroller based stepper controller with timing belt gear reduction to minimize PE.
RA Bearings are 50mm Bearings. Current RA shaft is Delrin with a steel Rod insert, but I'll be changing this to a steel tube.
I've added ST4 autoguiding by using a picaxe to monitor the 4 pins of the guidecam's ST4 output and adjusting the step gap duration in the stepper controller to either speed up RA or slow down RA.


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: Pinbout]
      #5661309 - 02/04/13 08:59 AM

Quote:

Quote:

The idea isn't that brilliant; it is a derivative of Porter's Springfield Mount.






I have something similar in my head but my counter weight hangs and uses the rocker box as a rail to glide on.



Unfortunately this counterweight device won't work well because as the tube rotates from vertical to horizontal, the amount of torque around the altitude axis increases greatly. The counterweight device in your picture produces a constant torque so it will balance at only one position. Possibly you could make it work by offsetting the center of the counterweight support disk so that the torque increases as the tube rotates to horizontal. But ideally the counterweight should hang from an arm that is parallel to the tube, in which case why not mount it directly on the arm or tube?

It is possible to build spring devices with torque that varies so that the tube is balanced at all positions. I've built one myself and have seen some others posted in this forum. But I think the simplest way to build a Newtonian that is balanced around the eyepiece is to just use a counterweight at the opposite end from the mirror.


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: Dick Jacobson]
      #5661375 - 02/04/13 09:43 AM

Quote:

Unfortunately this counterweight device won't work well because as the tube rotates from vertical to horizontal, the amount of torque around the altitude axis increases greatly.




i don't make changes in torque for my dobs, when I balance my dobs the torque is constant.

the only thing I see is an twist caused by weight on one side and not the other but that is easily remedied.

Quote:

But I think the simplest way to build a Newtonian that is balanced around the eyepiece is to just use a counterweight at the opposite end from the mirror.






thats not consistent with your first statement.


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tag1260
scholastic sledgehammer
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Reged: 10/07/12

Loc: Ohio, USA
Re: Post your home made scope new [Re: Pinbout]
      #5661493 - 02/04/13 10:46 AM Attachment (135 downloads)

Here's a pic of my Frankenscope. Started life as a Tasco 11TR and has had several mods throughout the years. Mirrors are original as is the tube but I built the dob mount for it and changed the focuser to a 1.25" Orion and the finder to a Daisy Red Dot with and adjustable light. Always planned on building a "proper" looking mount but never got around to it

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tim53
Postmaster
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Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: tag1260]
      #5661562 - 02/04/13 11:20 AM

Earle Dodds used to make Springfield mounts with counterweights on the tube plus a conventional weight in RA. For a dob mount, you'd only need a tube weight, so I think you could easily set it up so that it is less likely to jerk a knot upside your haid in the dark.

But a true Springfield is more better!

Tim


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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: tim53]
      #5661587 - 02/04/13 11:35 AM

Danny, I´m sorry, but you are wrong. Dick explained it correctly. You have an increasing torque, when the tube move in a horizontal orientation. That´s the reason, why I used springs with different power moments and different fix points on my travel Dob. The springs have a nonlinear power moment, and normally you need more than one spring to compensate some hysteresis effects...

@all: Very nice scopes are shown here!!!

cs
Markus

Edited by etalon (02/04/13 12:16 PM)


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: etalon]
      #5661613 - 02/04/13 11:55 AM

I'd appreciate if you spelled my name correctly.

show me your math...


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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: Pinbout]
      #5661661 - 02/04/13 12:27 PM

Sorry, I have corrected it.

My (technical) English is much to bad for explaining such things, I´m sorry, but you can read it in every book about primary physics or technical engineering...

Maybe there would be some other guys, who speak English much better than I, and who can explain it. I also don´t know, whether, and when how, I can write math formulas here on cn...

Markus

Edited by etalon (02/04/13 01:00 PM)


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: etalon]
      #5661793 - 02/04/13 01:35 PM

the more the expansions springs are expanded the less effective they are.

the lever arm on the scope I drew is about 6in away from the center of rotation, and the 6in mirror is approx. 32in away from the center of rotation.

so if I rough in the torque balance eq.

6in*(x)lbs = 32in*(y)lbs

so in this equation where do you implement the angle of momentum.


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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: Pinbout]
      #5661882 - 02/04/13 02:18 PM

The spring would not be less effective when it work in the range of elasticity. If you over expand the spring, it deform plastically, would became less effective and would be damaged.
Here is a link to calculate springs (compression-, extension- and torsion-springs):

http://www.federnshop.com/Berechnung/Schenkelfeder/SchenkelfederBerechnung.aspx

Maybe it would help.

In case of your Dobson, you get a torque moment depending on the length of the leverarm, the angel of the lever arm to the gravity force vector and the wight force at an arbitrary point on the lever arm.

Please excuse my bad English...

Markus


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: Pinbout]
      #5662111 - 02/04/13 04:51 PM

Maybe it would help to imagine holding a heavy dumbbell, simulating the weight of the mirror. When your arm is about vertical, it takes only a little force to start raising it, but when it reaches horizontal it takes a lot more force on your shoulder. Mathematically, the torque due to the mirror is proportional to the sine of the angle of the tube away from vertical.

I hope we haven't totally derailed this topic. There are some wonderful ideas here. Markus, your travel scope at the top of page 6 is magnificent!


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Pinbout
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Re: Post your home made scope new [Re: Dick Jacobson]
      #5662203 - 02/04/13 05:49 PM Attachment (85 downloads)

Quote:

Mathematically, the torque due to the mirror is proportional to the sine of the angle of the tube away from vertical.






just one more thing.

on the mirror side,from angles 0-45, torque=Length*lbs*cos angle, from angles 45-90, torque= length*lbs*sine angle.

so at 45* the torque is the least.

Still working on my travel dob


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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: Pinbout]
      #5662997 - 02/05/13 07:48 AM

That gonna be a carry on scope? looks almost ready to go. Nice workmanship

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Pinbout
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Re: Post your home made scope new [Re: droid]
      #5663094 - 02/05/13 09:01 AM

yep,

but I'm making different truss mounts,

like these



and my mirror is still hyperbolic

[I got a blank, but found it was polished figured and very,very hyperbolic now its only slightly hyperbolic]


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droid
rocketman
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Re: Post your home made scope new [Re: Pinbout]
      #5663154 - 02/05/13 09:33 AM

Cool video......my only concern would be Id get to the dark sky site and realize I didnt load the Allen wrenches, lol.
Could that be done with bolts with knobs??or would they get in the way of when packaging up for travel?


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Tom Clark
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Re: Post your home made scope new [Re: Pinbout]
      #5663180 - 02/05/13 09:45 AM Attachment (161 downloads)

Hows this for ugly? It is a 42" f/4. The reason for the square tube is to raise the balance point up towards the center of the tube. This allows for the scope to fit into a much smaller dome than the typical dob would - with a balance point closer to the mirror end. It also allows for the scope to be completely sealed up to keep dirt out when not in use. Interior doors close just over the mirror to keep the mirror clean.

The box near the focuser holds five of the most used eyepieces. The finder is a 5" f/9 to allow for wide-field views.

Edited by Tom Clark (02/05/13 09:47 AM)


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tag1260
scholastic sledgehammer
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Re: Post your home made scope new [Re: Tom Clark]
      #5663191 - 02/05/13 09:49 AM

Looks like a fine piece of furniture to me!!! Beautiful wood working there.

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droid
rocketman
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Re: Post your home made scope new [Re: Tom Clark]
      #5663232 - 02/05/13 10:07 AM

As an old ATMer told me years ago, after I fielding a dob uglier than the south side of a mule, " aint no such thing as an ugly telescope in the dark "

nough said, totally true


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Pinbout
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Re: Post your home made scope new [Re: droid]
      #5663259 - 02/05/13 10:17 AM

that's what I'm working on.

since it's made out of 3/4 ply, I need to raise it about a 1/4 in, so I made plates to raise it up. I have press fit knobs for the allen head screws. i'm using them here on the alt bearings



also its better to come in from the aperature hole side with the screw, the alt bearings kind of get in the way, on the backside it fine. compare the previous pic with this.



so goes my life make it twice before I get it right.


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Pinbout
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Re: Post your home made scope new [Re: Tom Clark]
      #5663267 - 02/05/13 10:21 AM

Quote:

Hows this for ugly? It is a 42" f/4.




I would have to agree, that is very ugly indeed.

now if you had a dragon [for heavan] or a tiger [for earth] burnt into the wood somewhere it would add the coolness back.


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etalon
member


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Loc: Germany
Re: Post your home made scope new [Re: Dick Jacobson]
      #5663455 - 02/05/13 11:52 AM

Quote:

There are some wonderful ideas here. Markus, your travel scope at the top of page 6 is magnificent!




Thanks a lot, Dick.

Danny, at 0° you will have the least torque moment.
Let´s have a look to a bearing and a mass (kg) which is fixed to the bearing with a stiff rod. Now, the gravitation will accelerating the mass by 9.81 m/s^2. This mean, that a wight force will pressure to the bearing in N ((kg*m)/s^2). If the force vector is going vertical through the bearing, your mass will hanging vertical, and the torque moment in the bearing is 0 (like the sin0°=0). Now we will deflect the mass (i.e. the scope) for some degree. There is now a distance (measures in m) between the wight force vector and the mass. This distance is your lever arm (standing rectangular on the wight force vector). Because of this lever arm, you get a torque moment ((kg*m^2)/s^2 or Nm) in your bearing. This will increase, when the deflection angle will increase, because the distance between the wight force vector and the mass (your lever arm) will increase, too. The torque moment will have the maximum at 90° (like sin90°=1), because if the angel further increase or decrease, your lever arm will always decrease, and there fore the torque moment will always decrease, too.

Now let´s look to the other side:

You have a counter mass hanging vertical and produce a wight force on the bearing (N). If you deflect the telescope, the mass will move along the wight force vector, so the wight force would always be the same. Even if you give a lever arm to that counter mass, the resulting negative torque moment at the bearing will be always the same, too. Now you can adjust the counter mass to equal one torque moment at the bearing, which is equal to one deflection angel of the telescope. If you deflect the telescope over that angel, it will sink back and in the other direction, the counter mass will rise up the scope to the point of torque moment equation.

I hope, you can understand, what I would say...


@Tom: Wow! That´s a huge scope! If you will make a more beautiful telescope for you, I will dispose the old one for you in the "garbage can" in my backyard...

cs
Markus

Edited by etalon (02/05/13 12:07 PM)


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Pinbout
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Re: Post your home made scope new [Re: etalon]
      #5663568 - 02/05/13 01:07 PM

Quote:

You have a counter mass hanging vertical and produce a wight force on the bearing (N). If you deflect the telescope, the mass will move along the wight force vector, so the wight force would always be the same. Even if you give a lever arm to that counter mass, the resulting negative torque moment at the bearing will be always the same, too. Now you can adjust the counter mass to equal one torque moment at the bearing, which is equal to one deflection angel of the telescope. If you deflect the telescope over that angel, it will sink back and in the other direction, the counter mass will rise up the scope to the point of torque moment equation.

I hope, you can understand, what I would say...






I understand all that but don't you think there would be capacity because of the radius of the bearing to minimize the differences in the angled vector force of the mirror and on the opposite side, the counter weight that has no changing angled vector, if you could understand my english?

one reason why I asked this is in a dob I rehab'd it wasn't balance very well. so when it got too close to zenith it tilted back, when it got below 30* it would nose dive. like the forces weren't linear and formed a curve base on what direction I was from 45*. I since have balanced it better and made bigger bearings.

just starting to rehab it.



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etalon
member


Reged: 01/07/13

Loc: Germany
Re: Post your home made scope new [Re: Pinbout]
      #5663626 - 02/05/13 02:00 PM

Yes Sir, hardly, but I can understand it...

Your problem looks to me, that the bearing was mounted in a way, which placed it outside the balance point in the long axis as well as outside the balance point in the short axis of the scope. in that case, the two torque moments are be superposed and effect the scope like you told it. Making the bearings bigger means only to increase the static friction because of a larger face. This can compensate a little imbalance...

cs
Markus


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killdabuddha
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Re: Post your home made scope new [Re: etalon]
      #5663663 - 02/05/13 02:23 PM Attachment (138 downloads)

Since the talk has turned to ugly scopes, I feel i can post a pic of ours in the basement where it was built. Do we win anything?

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Pinbout
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Re: Post your home made scope new [Re: killdabuddha]
      #5663668 - 02/05/13 02:25 PM

Quote:

Since the talk has turned to ugly scopes, I feel i can post a pic of ours in the basement where it was built. Do we win anything?




double the pleasure, double the fun.


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killdabuddha
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Re: Post your home made scope new [Re: Pinbout]
      #5663680 - 02/05/13 02:30 PM

Eye of the beholder and all that, eh? Clyde Tombaugh had the ugliest collection I've ever seen, so we were definitely inspired. Anybody got a lawnmower?

http://3.bp.blogspot.com/_1EV0TJJxmTE/S452Th_YmaI/AAAAAAAACFw/sReOKxtMC_s/s40...


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Pinbout
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Re: Post your home made scope new [Re: killdabuddha]
      #5663690 - 02/05/13 02:38 PM

they're meant to be used, not the queen of the garage...

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killdabuddha
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Re: Post your home made scope new [Re: Pinbout]
      #5663748 - 02/05/13 03:13 PM

I like yer dragon, Danny. Are you familiar with Chen Rong's "Nine Dragons?"

http://scrolls.uchicago.edu/view.php?env=STD_PUB&_scroll_id=54&lang=en


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: killdabuddha]
      #5663890 - 02/05/13 04:26 PM

Quote:

Since the talk has turned to ugly scopes, I feel i can post a pic of ours in the basement where it was built. Do we win anything?



I just hope you didn't make the same mistake as the guy who built a boat in his basement and then found he couldn't get it through the door! I would kill to get a look through that thing.


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idp
sage


Reged: 08/21/09

Loc: New Haven, CT
Re: Post your home made scope new [Re: Dick Jacobson]
      #5663971 - 02/05/13 05:12 PM Attachment (179 downloads)

Whatever you have, the Quinnipiac Monster is uglier.

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idp
sage


Reged: 08/21/09

Loc: New Haven, CT
Re: Post your home made scope new [Re: idp]
      #5663972 - 02/05/13 05:14 PM Attachment (138 downloads)

But it can definitely make it through the door of my garage

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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: killdabuddha]
      #5664026 - 02/05/13 05:35 PM

Awesome binoscope...all aluminum?

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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: idp]
      #5664035 - 02/05/13 05:38 PM

Awe but how does it work? if it works well, then thats all that matters.

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ed_turco
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Reged: 08/29/09

Loc: Lincoln, RI
Re: Post your home made scope new [Re: Dick Jacobson]
      #5664227 - 02/05/13 07:39 PM

Quote:

... I just hope you didn't make the same mistake as the guy who built a boat in his basement and then found he couldn't get it through the door! I would kill to get a look through that thing.




Just a quick aside... I built a bookshelf in my basement and guess, just guess...

Ed


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killdabuddha
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Re: Post your home made scope new [Re: ed_turco]
      #5664596 - 02/06/13 02:34 AM

Yes droid,

The deck is a sectioned 55-gallon drum that glides as a liner bearing I suppose, but the rest is aluminum skin around aluminum struts that prop up 4 lazy susan swivel bearings to provide rotation for IPD adjustment and also allow 2-person one-eyed viewing if desired. That works well for outreach too. Had to hog these out and drill them full of holes to reduce their weight. Got the cage, with focusers and star diagonals mounted, down to 12 pounds. As for the basement, I was relieved to find that we cleared the ceiling by 2 inches for the final assembly (had 2 get it vertical to get everything squared to drill the pole holes in place). Better to be lucky than good.

Ed, you crack me up. Glad yer still with us, even tho I can't follow most of what you do or discuss.

IDP, that is brilliant. Could it be any more user-friendly? Now thatsa unique design. Can honestly say I've never seen such an altitude control. Brake drums or tire rims? But what are the small adjustments for? Tensioners?


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: killdabuddha]
      #5664886 - 02/06/13 09:49 AM

Quote:

but the rest is aluminum skin around aluminum struts that prop up 4 lazy susan swivel bearings to provide rotation for IPD adjustment and also allow 2-person one-eyed viewing if desired.



Brilliant use of Lazy Susans! You've eclipsed my record, I used three in the 14-inch scope shown on page 5 of this topic.


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killdabuddha
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Re: Post your home made scope new [Re: Dick Jacobson]
      #5664995 - 02/06/13 11:04 AM


Yeah Dick,

Back when we were still plannin the build and puttin together the parts list, we came across yer use of these and learned from you that the lazy susan bearings were offered by different suppliers, tho we thought that they were the same. You pointed out that one maker's was thicker, and so heavier, than another, allowing us to opt for the lighter ones, so we thank you.


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: killdabuddha]
      #5665289 - 02/06/13 01:38 PM

Quote:


Yeah Dick,

Back when we were still plannin the build and puttin together the parts list, we came across yer use of these and learned from you that the lazy susan bearings were offered by different suppliers, tho we thought that they were the same. You pointed out that one maker's was thicker, and so heavier, than another, allowing us to opt for the lighter ones, so we thank you.



I haven't tried the lighter VXB bearings. Are you satisfied with their performance?


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killdabuddha
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Re: Post your home made scope new [Re: Dick Jacobson]
      #5665308 - 02/06/13 01:49 PM


Very much so, but would say that for your application the heavier gauge is of course the way to go. My only concern was that by hogging and drilling them out, the powder and filings would get into the bearings and foul them, so we packed them with grease beforehand.


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: killdabuddha]
      #5666712 - 02/07/13 09:40 AM

You all are way ahead of me in building telescopes....well done

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droid
rocketman
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Re: Post your home made scope new [Re: droid]
      #5668864 - 02/08/13 12:09 PM

killdabuddha: any photos of those giant binos in the field???

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killdabuddha
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Re: Post your home made scope new [Re: droid]
      #5669648 - 02/08/13 07:27 PM Attachment (134 downloads)

Yes droid,

But they're on a camera whose pixel count seems too high for here. Here's one from the back yard (taken with the phone camera) where we use it at home. Sorry for the poor angle, quality, etc. And yeah, I actually cut the grass right afterward. We've also since flocked it, put in light shields, and painted the poles with chalkboard paint.


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Norm Folkers
member


Reged: 03/26/08

Re: Post your home made scope new [Re: ed_turco]
      #5669741 - 02/08/13 08:45 PM Attachment (174 downloads)

Hi Ed,
Great to see that your still able to enjoy observing. I too have used the Springfield idea and come up with a design that uses a refractor objective rather than a mirror to get a fixed eyepiece position in an equatorial mount. It's almost completely made from 4' standard ABS pipe fittings. The bearing surfaces are the threaded parts of the RA and Dec axis. The eyepiece position is at the North end of the RA axis. One can observe any part of the sky without having to get up. The focal plan does change when moving to a new target that is not at the same Dec. But only 1/2 the thread pitch of the 4" pipe. It would be very convenient for someone like you why has increasing mobility issues (again, I hope that's a long way off). The upper end of the Dec "t" fitting is threaded so as to allow different Objectives with different FL to be used. To accommodate this a correctly cut-to-length ABS pipe is used to hold the objective cell and the male threaded other end that screws into the "T". The picture shows a 5" 900 mm FL objective. The design requires the use of two diagonals, The lager one is inside the "T" fitting at the intersection of the OTA and the Dec axis while a smaller one is at the intersection of the Dec and RA axis. It operated quite well. My alternative to a finder scope is a green laser used to "get close" to the object I'm intending to observe. It avoids the need to get up. I use it sparingly ;-)
I've made three of these. The prototype was made using 3" ABS pipe. It eventually got a 4" to 3" adapter enhancement to allow objectives up to 100mm to be screwed into the upper OTA (above the "T" fitting). This is a mark II. the third I made for a friend who was unable to complete it due to time constraints. I've also added guy wires from the ends of the three legs to the top of the "y" fitting. It helped A LOT!
I also live at just South of 45 deg North latitude, so the adjustable feet, made from "C" clamps allow close polar alignment, certainly good enough for visual observing.
Clear skies.
Norm


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Mirzam
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Re: Post your home made scope new [Re: Norm Folkers]
      #5670216 - 02/09/13 07:06 AM

Very creative!

JimC


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Norm Folkers]
      #5673507 - 02/11/13 05:40 AM

Been looking at this for days now, still scratching my head, lol.
Awesome idea, wish I could wrap my poor brain cells around the principles.


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Norm Folkers
member


Reged: 03/26/08

Re: Post your home made scope new [Re: droid]
      #5673637 - 02/11/13 08:49 AM

This is really an OTA and an equatorial mount merged together to allow observing at a fixed position.
The top of the "Y" fitting and the "T" fitting just below the eyepiece is the polar axis. It has a threaded bearing between these two fittings. A torq tube runs from this "T" fitting through the "Y" fitting and comes out to support a counterweight made from barbell weights. This is effectively the Dec axis counterweight.
The OTA begins at the eyepiece and proceeds a short distance to a small diagonal mirror that intercepts the light cone coming from a larger diagonal located inside the second "T" fitting. In between these two "T" fittings is the Dec axis bearing, again made from standard ABS fittings, just not tightened to the point where it would bind. The maximum rotation of this bearing (thread) is 180 deg so it changes the focal plane position position by 1/2 the distance from thread to the next. This happens only when moving from one object to the next when they are at different DECs. Next is the upper "T" fitting, it has the larger of the two diagonals installed inside. In my case it is a 4" (minor axis) to allow the maximum sized objective. The end of the "T" opposite the objective is simply a counterweight to balance the upper half of the OTA. This upper T has a threaded fitting that allows different sections of the upper OTA to be screwed into it. This allows having different sized and FL objectives to be screwed into it. The lenght of this part of the OTA is custom cut to allow the objective to place it's focal plane in the right position to allow an eyepiece to magnify the image formed there.
Those are the essentials. I believe Zeiss sold a similar design in the early 1960ies for over $18,000.00. Mine cost considerably less.
This configuration allows sitting down as well as enclosing part of the scope in an enclosure to increase observing comfort.
It works for me.
Norm Folkers


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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Post your home made scope new [Re: Norm Folkers]
      #5673735 - 02/11/13 10:08 AM

Very nicely done, Norm! Many years ago I became fascinated with the idea of a scope with a fixed eyepiece position. I put an 80mm refractor inside a 4" PVC pipe, with a pair of elliptical diagonals in front of the objective arranged so they would rotate and point anywhere in the sky. The refractor pointed down the polar axis. I got the contraption to work, but ran into an unexpected problem. It was nearly impossible to find anything with it since you couldn't sight along the tube (the tiny stub of a tube was way at the bottom near the ground). I tried to build a finder arrangement but it got hopelessly complicated. I called it my "Alphorn telescope".

Here is a link to an awesome, fully enclosed fixed position telescope built by a friend of mine. He is currently working on a larger version. See Tardis Telescope.


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gpelf
sage


Reged: 12/28/11

Loc: Kentucky
Re: Post your home made scope new [Re: Dick Jacobson]
      #5673752 - 02/11/13 10:12 AM

That is just to "Cool", Anyone got a Extra porta-pottie

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Norm Folkers
member


Reged: 03/26/08

Re: Post your home made scope new [Re: Dick Jacobson]
      #5673924 - 02/11/13 11:57 AM

Hi Dick,
I've seen that scope several times, once, I believe on the cover of a ATM magazine. It is an inspiration. I particularly like the idea of a warm bug free enclosure.
I solved my finder problem by using a green laser attached to the upper part of the OTA. I'm going to change that to be attached to the upper part of the outer "T" fitting. This will mean it does not have to be changed over to the alternate upper OTA each time. It will of course need some re-allignment with each switch. As with all thing ATM, the scope is never really "finished"; nor should it be.
If I could find a source for 6" ABS fittings I would consider building a larger one for use with a 6" objective. That would be an extra half magnitude or 44% more photons that a 5" can deliver. (Aperture rules!)
I hope it gives people ideas and can take this design to the next level, say with a clock drive good enough for visual use. Astrophotography would be the ultimate goal. But then I would not need to sit there at the eyepiece. But we already have lots of good designs that do that. This is for old style photons hitting the retina.
Clear skies... or cloudy, for us ATMers it does not matter that muck ;-)


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Norm Meyer
sage
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Reged: 02/08/09

Loc: Warren, ME 04864
Re: Post your home made scope new [Re: Norm Folkers]
      #5674220 - 02/11/13 03:18 PM Attachment (177 downloads)

Here is a picture of my largest scope to date. It's a 10" f5.3 one of my better mirrors I made. The mount is a knock
off of a commercially made mount. The base ring and 10"
setting circles are aluminum valve hand wheels I bought as scrap from work. Most of the parts are aluminum except
for the shafts which are drill rod, and the bearings which
are steel of course.


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: Norm Meyer]
      #5674222 - 02/11/13 03:20 PM

what size shafts are you using?

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Norm Meyer
sage
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Reged: 02/08/09

Loc: Warren, ME 04864
Re: Post your home made scope new [Re: Norm Meyer]
      #5674224 - 02/11/13 03:20 PM Attachment (114 downloads)

Here's a better shot of the base.

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rembert
journeyman


Reged: 11/23/09

Re: Post your home made scope new [Re: Norm Meyer]
      #5675439 - 02/12/13 09:25 AM Attachment (139 downloads)

Here's my 9 inch F1800 mm refractor. After some fiddling with the distance between the two elements it performs well.

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BDC1974
member


Reged: 03/09/12

Loc: Miami, FL
Re: Post your home made scope new [Re: Ed D]
      #5675481 - 02/12/13 09:49 AM Attachment (105 downloads)

Quote:

This is my 'Little Dipper' project, about one week into making sawdust. The composite pic shows the primary end and my method of mirror attachment, as well as the 'tube' next to me for scale. I just lightly pressed together the poles and parts to see how it was coming along. Oh, in case you're wondering, it's going to be a 6" f/8 using the old Synta mirror from Mighty Mouse, pictured in my avatar.

Thanks to my friend Brian for inspiring me to build this scope. I'm really enjoying the project.

Ed D




Looking good Ed! Can't wait to give her a try on the next Everglades trip.


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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: rembert]
      #5675482 - 02/12/13 09:50 AM

9 inches, wow......f/5 or so???

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BDC1974
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Reged: 03/09/12

Loc: Miami, FL
Re: Post your home made scope new [Re: BDC1974]
      #5675483 - 02/12/13 09:52 AM

That's my baby which was coincidentally 9 months in the making. No previous wood working experience. Thanks to Ed for helping me work out secondary alignment issues.

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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: BDC1974]
      #5675498 - 02/12/13 10:00 AM

Beautiful, if she works as good as she looks....wow

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rembert
journeyman


Reged: 11/23/09

Re: Post your home made scope new [Re: droid]
      #5675514 - 02/12/13 10:10 AM

No, slightly less than F/8, 1800 mm to be exact. Max. usable magnification is about 400-500 x, with a Fringe-killer.

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Don M
super member


Reged: 10/12/08

Loc: Roseau, Minnesota
Re: Post your home made scope new [Re: droid]
      #5675901 - 02/12/13 01:49 PM

Hi - What a great place to hang out!! I really enjoy the science, engineering, humor, and a bit of philosophy from all over the world
- while having a cup of coffee!! I am old enough to view 'how we do this', as 'science fiction!' However, I am still searching for a
reliable antidote against aperture fever!! - binoculars, small scopes, medium scopes, finance, portable scopes, staying off the computer
- the tug is still there!! Here are a couple of my ATM projects. I know that some of these photos are on other threads.
CN Rocks! Don M (StarRocker)

The white scope is a 10 inch f/5.6


On my way to a school 'Star Party!'


10 inch f/4.5


Please don't 'bump me' lights!


'Look Mom - no tools!'


'Tough astronomer'(not me!) - that is snow in the back ground!


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mikey cee
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Re: Post your home made scope new [Re: rembert]
      #5675919 - 02/12/13 01:57 PM

Quote:

No, slightly less than F/8, 1800 mm to be exact. Max. usable magnification is about 400-500 x, with a Fringe-killer.


Who's lens did you use and is it coated? Mike

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herrointment
Post Laureate
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Reged: 03/12/11

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Re: Post your home made scope new [Re: mikey cee]
      #5676289 - 02/12/13 05:01 PM

Don, your 10 inch F4.5 is my favorite ATM scope ever!

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rembert
journeyman


Reged: 11/23/09

Re: Post your home made scope new [Re: mikey cee]
      #5676317 - 02/12/13 05:16 PM Attachment (97 downloads)

It's nicely coated. It's from Barride Optics. Here another photo from the lens in the scope, taken while I was testing it and was still without proper internal flocking and baffling.

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rembert
journeyman


Reged: 11/23/09

Re: Post your home made scope new [Re: Don M]
      #5676328 - 02/12/13 05:25 PM

A reliable antidote against aperture fever is using a big scope under a light polluted sky. Also avoid acclimatisation of the thing al all costs.

But , that said, your ATM-work is impressive!!


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tim53
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Re: Post your home made scope new [Re: rembert]
      #5676411 - 02/12/13 06:41 PM

My 12.5" f/23 Classical Cassegrain when it was on my Springfield mount a while or two back. Fred Ley pic (I don't have any of my own for some reason!). I've since reconfigged the scope to a straight through Cassegrain and put it on my EM-500 mount.



-Tim.


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Pinbout
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Reged: 02/22/10

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Re: Post your home made scope new [Re: Don M]
      #5676623 - 02/12/13 09:28 PM

Quote:

On my way to a school 'Star Party!'





Hey Don,

the only thing wrong with the trailer/scope is it's not hook up to a goldwing, instead of a vehicle with 4 wheels.


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Don M
super member


Reged: 10/12/08

Loc: Roseau, Minnesota
Re: Post your home made scope new [Re: Pinbout]
      #5676751 - 02/12/13 10:51 PM

Quote:

Quote:

On my way to a school 'Star Party!'





Hey Don,

the only thing wrong with the trailer/scope is it's not hook up to a goldwing, instead of a vehicle with 4 wheels.




Hey Danny! - I hear ya!! But even in Minnesota I have not been able to find a Goldwing with 4-wheel drive!!!


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Pinbout
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Re: Post your home made scope new [Re: Don M]
      #5677329 - 02/13/13 09:58 AM

Quote:

Quote:

Quote:

On my way to a school 'Star Party!'





Hey Don,

the only thing wrong with the trailer/scope is it's not hook up to a goldwing, instead of a vehicle with 4 wheels.




Hey Danny! - I hear ya!! But even in Minnesota I have not been able to find a Goldwing with 4-wheel drive!!!




if you have a sidecar you can drive it in the snow! or the old man wheels in the back to make it a tricycle.


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Don M
super member


Reged: 10/12/08

Loc: Roseau, Minnesota
Re: Post your home made scope new [Re: Pinbout]
      #5677832 - 02/13/13 03:05 PM

Quote:

Quote:

Quote:

Quote:

On my way to a school 'Star Party!'





Hey Don,

the only thing wrong with the trailer/scope is it's not hook up to a goldwing, instead of a vehicle with 4 wheels.




Hey Danny! - I hear ya!! But even in Minnesota I have not been able to find a Goldwing with 4-wheel drive!!!




if you have a sidecar you can drive it in the snow! or the old man wheels in the back to make it a tricycle.




Danny! - Now that you mentioned side cars - check this out! (from my gallery)

Harley, Honda, Bike!!
Honda & Bike
Bike Side Car
Kids - Side Car!

One cannot live on astronomy and related equipment alone!! Don M (StarRocker) CN Rocks!!


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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: Don M]
      #5677847 - 02/13/13 03:15 PM

Quote:

Quote:

Quote:

Quote:

Quote:

On my way to a school 'Star Party!'





Hey Don,

the only thing wrong with the trailer/scope is it's not hook up to a goldwing, instead of a vehicle with 4 wheels.




Hey Danny! - I hear ya!! But even in Minnesota I have not been able to find a Goldwing with 4-wheel drive!!!




if you have a sidecar you can drive it in the snow! or the old man wheels in the back to make it a tricycle.




Danny! - Now that you mentioned side cars - check this out! (from my gallery)

Harley, Honda, Bike!!
Honda & Bike
Bike Side Car
Kids - Side Car!

One cannot live on astronomy and related equipment alone!! Don M (StarRocker) CN Rocks!!





love the springer, but that bike with sidecar is awesome.


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Don M
super member


Reged: 10/12/08

Loc: Roseau, Minnesota
Re: Post your home made scope new [Re: herrointment]
      #5677980 - 02/13/13 04:40 PM

Quote:

Don, your 10 inch F4.5 is my favorite ATM scope ever!




Thanks for the nice comment Jim - much appreciated. It was a fun/long project. I would like to use it more than I do but with weather, jobs, etc etc?? In Minnesota half the time it is winter - and the other half it's cloudy!! Actually the winter conditions are quite good - very dark where I live and the air is clear, but not very stable, and of course cold - but we are used to that!! Don M (StarRocker) (My CN Gallery) CN Rocks


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rogercelliott
sage


Reged: 09/19/08

Loc: Redding, CA
Re: Post your home made scope new [Re: Norm Meyer]
      #5678221 - 02/13/13 07:26 PM

Hi Norm,
Very cool looking scope there! I like the setting circles! I made my setting circles from craft disks I found at a Michaels. Unfortunately the hand-drawn division lines didn't some out so well so I'm going to glue CAD drawings on the disks instead...

Cheers
Roger

Edited by rogercelliott (02/13/13 07:29 PM)


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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: rogercelliott]
      #5679671 - 02/14/13 02:50 PM

Roger,

Have you considered using an aluminum yard stick graduated in 1/10th of an inch? Bend it into a circle and each 1/10th inch will equal 1 degree. The diameter will come to 36/Pi=11.46" Cut a wood disk to that outside diameter, and a smaller concentric hole with inside diameter to fit your shafts. The right ascension will equal 1.5 inches per hour and each 1/10th inch will equal 4 minutes. I haven't done this yet, but it seems like it would work.

Larry


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RobertED
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Reged: 07/11/03

Loc: Smithfield, RI
Re: Post your home made scope new [Re: ed_turco]
      #5679698 - 02/14/13 03:02 PM

Quote:

Tell you about marrying a girl. My first wife hated astronomy, telescopes and all my friends. And then even me.

She took off and I got a divorce. Five years later I met a special girl who was so different. Not trusting my instincts, I taught her telescope making and insisted that she make one.

She did, and I married her two weeks later! Never regretted it in what now is almost 32 years. We married on Valentines Day, and now I have a granddaughter due on that same day -- our first.

Ed




Congratulations!!, Ed and Denise!!!....and Happy St. Valentine's Day, too!!!!!


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rogercelliott
sage


Reged: 09/19/08

Loc: Redding, CA
Re: Post your home made scope new [Re: Larry Silvestri]
      #5680145 - 02/14/13 08:09 PM

Quote:

Roger,

Have you considered using an aluminum yard stick graduated in 1/10th of an inch? Bend it into a circle and each 1/10th inch will equal 1 degree. The diameter will come to 36/Pi=11.46" Cut a wood disk to that outside diameter, and a smaller concentric hole with inside diameter to fit your shafts. The right ascension will equal 1.5 inches per hour and each 1/10th inch will equal 4 minutes. I haven't done this yet, but it seems like it would work.

Larry




Hi Larry,
Very cool idea if I had a way to make a decent wooden circle I would definitely try it. My mounting also limits me (especially on the RA axis) to 9" in diameter

Cheers
Roger


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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: rogercelliott]
      #5681033 - 02/15/13 09:58 AM

Waiting for the first light





Toni


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: titanio]
      #5681099 - 02/15/13 10:34 AM

Hey Toni,

NOW THAT IS WHAT I AM TALKING ABOUT.

Simply a Beautiful Scope,


Alan O.


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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: StarWrangler]
      #5681102 - 02/15/13 10:36 AM

Thank you Alan

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: titanio]
      #5681673 - 02/15/13 02:33 PM

holy ...ummmmm cow, thats freakin awesome.

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: titanio]
      #5681749 - 02/15/13 03:10 PM

Hey Toni,

Can you post some Specs on it,


Alan O.


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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: StarWrangler]
      #5682205 - 02/15/13 07:27 PM

Hello
This telescopes is a classical Cassegrain, the total weight is only 47.63 pounds, just because I have used carbon fiber with balsa wood and aluminum. I can even reduce 4 pounds the total weight of the telescope, I have used aluminum for the trusses, in a future I would like to use carbon fiber trusses.
The primary mirror is a conical 16” from Royce, it has an Inter-mirror distance of 50.84- inches,
the Secondary is also from Royce with a diameter of 3.60-inches and the Back Focus is 14.5-inches
No floating cell is needed for the conical mirror.

I use a Moonlite dual focuser and the finder is fron celestron.
The mound, is a CPC mount from Celestron, I just have changed the arms, in a future if God wants, I am going to buy a nice mount for my Cassegrin.

Toni


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: titanio]
      #5682237 - 02/15/13 07:46 PM

Just Fantastic Toni,

I'm drooling,


Alan O.


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zjc26138
Loved By All
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Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: Post your home made scope new [Re: StarWrangler]
      #5682244 - 02/15/13 07:53 PM

Toni,
That is one gorgeous scope!


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titanio
sage


Reged: 02/15/09

Loc: Alicante, Spain
Re: Post your home made scope new [Re: zjc26138]
      #5682329 - 02/15/13 08:56 PM

Thank you all,

Now I just need good weather for the first light

Toni


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rogercelliott
sage


Reged: 09/19/08

Loc: Redding, CA
Re: Post your home made scope new [Re: droid]
      #5682689 - 02/16/13 12:59 AM

OK, here's my homemade scope, a 10" f/4.5 mirror refigured by OWL (And it came out nice). 1.5" RA shaft, 1" Dec shaft. Most everything put together with no more than a drill press excpet for a few parts that I was able to make when I had machining classes year ago. MoonLite focuser, homemade spider diagonal, University Optics Mirror mount, drilled out and fitted with a fan and baffle for thermal eqilibrium. For now a pic of the mount....

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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: rogercelliott]
      #5686015 - 02/17/13 09:36 PM

Roger did you attach a photo?

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rogercelliott
sage


Reged: 09/19/08

Loc: Redding, CA
Re: Post your home made scope new [Re: droid]
      #5686348 - 02/18/13 01:56 AM

Ooops.... tried to attach photo and it didn't work .... internet troubles.... Will try again

Cheers
Roger


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: rogercelliott]
      #5687521 - 02/18/13 06:40 PM

If you need help , please let me know

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Intergallactic
sage


Reged: 09/17/10

Loc: Little Rock, Ar
Re: Post your home made scope new [Re: droid]
      #5688007 - 02/18/13 10:53 PM Attachment (184 downloads)

Binoscope I built.

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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Intergallactic]
      #5688333 - 02/19/13 05:01 AM

awwww man those are gorgeous....what size objectives?

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Post your home made scope new [Re: Intergallactic]
      #5688620 - 02/19/13 10:30 AM

Love that wood wood work on the bino.,

Alan O.


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: Intergallactic]
      #5688633 - 02/19/13 10:40 AM

Quote:

Binoscope I built.




more pics please


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Intergallactic
sage


Reged: 09/17/10

Loc: Little Rock, Ar
Re: Post your home made scope new [Re: droid]
      #5688682 - 02/19/13 11:16 AM

Thank you,

Here is my original post.

http://www.cloudynights.com/ubbthreads/showflat.php?Cat=&Board=atm&Nu...


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droid
rocketman
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Reged: 08/29/04

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Re: Post your home made scope new [Re: Intergallactic]
      #5688921 - 02/19/13 01:31 PM

sweeet build thread.....

Broken foot observatory? story there, lol


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Intergallactic
sage


Reged: 09/17/10

Loc: Little Rock, Ar
Re: Post your home made scope new [Re: droid]
      #5689446 - 02/19/13 06:34 PM

"story there"

Broke my calcaeus into 3 pieces working on the rails. Thus the name.


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zeldaboy101
Carpal Tunnel
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Reged: 03/13/04

Loc: Maryland
Re: Post your home made scope new [Re: droid]
      #5689739 - 02/19/13 09:15 PM Attachment (162 downloads)

Here's my 16" f/4.5. The messy wiring is being taken care of and the shoebox dew shield over the telrad has been upgraded since, I just haven't gotten a more recent picture.

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starman345
Wait, I'm Thinking
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Reged: 07/06/10

Loc: New Brunswick, Canada
Re: Post your home made scope new [Re: zeldaboy101]
      #5690309 - 02/20/13 07:51 AM

Nice telescope, I like that shroud color, real eye catcher.

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zeldaboy101
Carpal Tunnel
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Reged: 03/13/04

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Re: Post your home made scope new [Re: starman345]
      #5690528 - 02/20/13 10:03 AM

Quote:

Nice telescope, I like that shroud color, real eye catcher.




That's why I did it, black shrouds were too boring and generic for me. The orange shroud does have a black liner however. I also think that being a double layer shroud, it probably keeps moisture out even better.


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droid
rocketman
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Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: zeldaboy101]
      #5690562 - 02/20/13 10:20 AM

I can see it now, some one at a star party asks you which one is yours, and you reply, the one over there glowing in the sun.

Mines just plain, boring, black. lol

Edited by droid (02/20/13 10:21 AM)


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zeldaboy101
Carpal Tunnel
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Reged: 03/13/04

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Re: Post your home made scope new [Re: droid]
      #5690715 - 02/20/13 11:54 AM

It does make finding my way back to my stuff on a crowded field a little easier!

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bremms
Carpal Tunnel
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Reged: 08/31/12

Loc: SC
Re: Post your home made scope new [Re: droid]
      #5691751 - 02/20/13 08:57 PM Attachment (123 downloads)

My 4" F-15 Jaegers lens.. Nothing too out of the ordinary.
I made the lens cell, end cell, finder (old Edmund lens) and baffles. Lens is superb, really one of my favorites.


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bremms
Carpal Tunnel
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Reged: 08/31/12

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Re: Post your home made scope new [Re: bremms]
      #5691759 - 02/20/13 09:01 PM Attachment (98 downloads)

Cell

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bremms
Carpal Tunnel
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Reged: 08/31/12

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Re: Post your home made scope new [Re: bremms]
      #5691760 - 02/20/13 09:02 PM Attachment (98 downloads)

Another

Edited by bremms (02/20/13 09:03 PM)


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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: bremms]
      #5691949 - 02/20/13 11:17 PM

A very nice piece of work. Those old Jaegers lenses are superb. Did you do your on machining?? Mike

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neo
Carpal Tunnel
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Reged: 02/12/08

Loc: Iasi, Romania
Re: Post your home made scope new [Re: mikey cee]
      #5692166 - 02/21/13 03:37 AM

I know it's a bit premature to post but I couldn't resist seeing that superb 4"Jaegers so here goes its little brother , my 83mm F/15 Jaegers still in the making.
All machined aluminum.







@Bremms, do you use one of the lenses from SShed? Is it coated?


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bremms
Carpal Tunnel
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Reged: 08/31/12

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Re: Post your home made scope new [Re: mikey cee]
      #5692252 - 02/21/13 06:46 AM

I did. all the machining other than the GSO focuser. The lens cell is just bolted flat to the flange. The end of the tube is square and the lens is perfectly collimated withou adjustment. Working on a Jaegers 6" F10, but haven't started making parts. Did get the aluminum for the front cell.

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Jim Curry
Pooh-Bah
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Reged: 10/29/07

Loc: STL
Re: Post your home made scope new [Re: bremms]
      #5692893 - 02/21/13 02:47 PM

Excellent workmanship, Marc. Funny how doing your own machining means perfect alignment, eh?

How are you going to paint them?

Jim


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bremms
Carpal Tunnel
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Reged: 08/31/12

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Re: Post your home made scope new [Re: Jim Curry]
      #5692996 - 02/21/13 03:55 PM

Might leave the tube bare. I was going to try and anodize the the cells but the lens cell is 7075 and 7075 does not anodize really well. Bare it is for now, I have a couple tubes that might get powder coated.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: bremms]
      #5695561 - 02/22/13 08:21 PM

ever work 6061?

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tim53
Postmaster
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Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: droid]
      #5695571 - 02/22/13 08:29 PM

I like how OSH semi gloss black rattle paint comes out with a coat of etching primer under it:



Tinky's visual back (was badly faded and oxidized anodized black).

-Tim.


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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: tim53]
      #5696330 - 02/23/13 10:44 AM

Now that's slick. Mike

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: mikey cee]
      #5706765 - 03/01/13 08:49 AM Attachment (111 downloads)

My latest rehab: http://www.cloudynights.com/ubbthreads/showflat.php?Cat=0&Board=classics&...

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Steven Aggas
scholastic sledgehammer


Reged: 04/15/08

Loc: Arizona
Re: Post your home made scope new [Re: droid]
      #5706961 - 03/01/13 10:44 AM Attachment (111 downloads)

Among other scopes I've built, this is the latest; a satellite tracking radio telescope.... Capable of transmit mode too.

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bob71741
Pooh-Bah
*****

Reged: 02/16/08

Re: Post your home made scope new [Re: Steven Aggas]
      #5707159 - 03/01/13 01:13 PM

Interesting antenna-any details on it and the receiver? did not find anything on your website.

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Steven Aggas
scholastic sledgehammer


Reged: 04/15/08

Loc: Arizona
Re: Post your home made scope new [Re: bob71741]
      #5707388 - 03/01/13 03:38 PM

Hi Bob, there are four 50-foot cables; 12VDC power cable, a control cable to stop/start/reverse the step motor for ascending or descending orbits, and, two antenna cables for the UHF/VHF sections, that will tie the Kenwood TS-2000X transceiver to the tracking antenna mount.

Best,
Steven


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Steven Aggas]
      #5708174 - 03/02/13 04:05 AM

Steven; thats cool man........you note its capable of transmit?
Doing SETI with it?


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Steven Aggas
scholastic sledgehammer


Reged: 04/15/08

Loc: Arizona
Re: Post your home made scope new [Re: droid]
      #5708503 - 03/02/13 10:35 AM

Ok, I was keeping this on the low-down.... At the star party I host yearly for friends I always find cool things to do. http://darkskyobserving.com/OSP.html
Check out OSP IX for 2013 and the other links for previous years....

Steven


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Steven Aggas]
      #5708545 - 03/02/13 10:55 AM

Steven thats awesome, youll have to keep us up on whether it works.

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Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Re: Post your home made scope new [Re: droid]
      #5708680 - 03/02/13 12:08 PM Attachment (121 downloads)

Four weeks ago to the day I posted the small Dob project I'm working on. It's on page 7, about 1/3 of the way down. Originally I was going to make it one piece but decided to make it a split assembly, along with a few tweaks I made along the way. There's still quite a bit of work left to do, but it's coming along nicely.

Ed D


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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Ed D]
      #5708704 - 03/02/13 12:19 PM

Beautiful wood working, did you split it due to a long focal length, or just to make it easier to handle?.

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Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Re: Post your home made scope new [Re: droid]
      #5709686 - 03/02/13 10:36 PM

Thanks for the compliment on my woodworking. I'm actually trying out a lot of ideas with the ultimate goal of one day making a 10" or 12" Dob for dark sky using this design. One of my goals is to see how inexpensive I can make it. Almost everything was fabricated from scraps or was in my miscellaneous hardware containers.

Speaking of building a Dob on the cheap, I was walking my Labrador Retriever and saw some beautiful plywood in the dumpster in front of a fire damaged home. I asked the contractor and he said that someone had dumped the wood in his trash container and I could have it. It's gorgeous 13 ply furniture grade stuff that I can make the wood parts for the 12" Dob. How cool is that!

Ed D


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Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Post your home made scope new [Re: Ed D]
      #5709923 - 03/03/13 04:26 AM

Superb woodworking, looks really cool.

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Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Post your home made scope new [Re: Rutilus]
      #5709924 - 03/03/13 04:27 AM Attachment (126 downloads)

Here's my split-tube Istar 150mm f/15 lens build.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Ed D]
      #5710055 - 03/03/13 07:47 AM

wow, lucky find there, and I do love recycling stuff.

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Rutilus]
      #5710057 - 03/03/13 07:48 AM

Quote:

Here's my split-tube Istar 150mm f/15 lens build.







PVC?


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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5719591 - 03/07/13 11:00 PM Attachment (122 downloads)

This is a 6" f12 with a Hastings tube on my old Starliner mount. I just finished it in February. I polished the mirror with rouge till a green laser did not leave a trace on the surface. Then I tested with a 3 zone couder mask and added a bit of correction. It shows a lot of detail on Jupiter.

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rguasto
scholastic sledgehammer
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Reged: 11/18/10

Loc: Long Island, NY
Re: Post your home made scope new [Re: Larry Silvestri]
      #5719927 - 03/08/13 07:22 AM Attachment (160 downloads)

4" F10 with carton mirror

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droid
rocketman
*****

Reged: 08/29/04

Loc: Conneaut, Ohio
Re: Post your home made scope new [Re: Larry Silvestri]
      #5719930 - 03/08/13 07:25 AM

Awesome scope, with a curved spider and small secondary , it ought to approach apo like images.

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1Old Timer
journeyman


Reged: 01/13/13

Loc: Loveland, CO
Re: Post your home made scope new [Re: Larry Silvestri]
      #5720245 - 03/08/13 10:43 AM

My first scope was a homemade 3" Edmund reflector made from a kit by my father as a Christmas present five days before my 11th birthday. It was built from a $29.95 kit that essentially had a 3"primary, a secondary and two Plano-convex lenses to make a 1"FL Ramsden eyepiece. The vague instructions were on a single sheet mimeographed page. The telescope building learning curve was quite steep for my Dad to say the least.

Living in SE Penna.,Edmunds wasn't too far away. Their retail store had orders of magnitude of more "stuff" than their catalog. Going there was like going to a candy store. I think my first purchase was a set of lenses to make a finder for my homemade 3" Reflector along with a 10 lens experimenters kit. Sorry for no pictures, they didn't have digital toys and computers back then in 1957.

Best Christmas present ever!


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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: 1Old Timer]
      #5720474 - 03/08/13 12:51 PM

Oldtimer I got my 3" Edmunds a few years later already built for $29.95! Another oldtimer Mike.

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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: droid]
      #5722181 - 03/09/13 12:09 PM

Quote:

Awesome scope, with a curved spider and small secondary , it ought to approach apo like images.




Thank, Andy. I set it up last night at the Michigan City Library and first time public viewers had no trouble seeing the red spot, Ganymede as a disk, and detail in Jupiter's belts. Of all my scopes this 6in-f12 Newtonian has the sharpest image. It resolves better than my old 8in-f11 Newtonian; both have under 15% obstruction and curved spider. The difference is that I rouge-polished this 6" mirror till my green laser pointer penetrated the surface without a trace. Now I am a believer that, while general surface accuracy is important, the quality of the polish is equally important.


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droid
rocketman
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