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Equipment Discussions >> ATM, Optics and DIY Forum

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nomosnow
sage


Reged: 03/21/11

Loc: Fort Saskatchewan,Ab ,Canada
Re: Post your home made scope new [Re: dawsonian2000]
      #5939415 - 06/25/13 10:00 AM

Hi Mel
PM sent
John


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starquake
sage


Reged: 02/02/08

Loc: Nádasdladány
Re: Post your home made scope new [Re: dawsonian2000]
      #5963620 - 07/10/13 07:47 AM



My home made 155/1110 Newtonian, with the first (and sofar only) mirror I've ever made (98.6% strehl value). With helical focuser, square 1x finder, vinyl record azimuthal bearing, tube made of rotated wooden squares. The alt axis is represented by the cores of the spiral galaxies on both sides of the scope. Here's a brief video about it perhaps with more visual details, although it's in Hungarian: http://youtu.be/knvW9yWSaxQ?t=6m29s


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kfrederick
Carpal Tunnel
*****

Reged: 02/01/08

Re: Post your home made scope new [Re: starquake]
      #5963627 - 07/10/13 08:00 AM Attachment (121 downloads)

Here is my 17inch f9 Wide Band Chief

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DonnyM
member


Reged: 10/20/10

Loc: Spirit Lake, Idaho
Re: Post your home made scope new [Re: droid]
      #5974498 - 07/16/13 04:13 PM Attachment (120 downloads)

Here is my DIY 18" Dob. It started life as a 18" Sky Designs. I saved the Primary and secondary and tossed the rest.
I created a 18" floating point mirror cell all in Aluminum. I used a 24" dia Aluminum bearing for the AZ. The Alt is a set of half rings of 3/4" thick Baltic Birch made on my CNC router that I built, and some brass I turned on my lathe.
I made the spider out of thin Aluminum and had a Novac Secondary holder. I added a 10:1 Moonlite focuser and a telrad.
The Alt ,truss polls, cell, and upper ota with telrad and focuser weigh 32lbs. The Alt weighs 8lbs and the mirror weighs 29.4lbs. I added 3 9lb counter weights that go between the Alt bearings out of 1 1/2" chromolly I had laying around. It takes just a couple minutes to set it up and it hold collimation very well from set up to set up.

Donny


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DonnyM
member


Reged: 10/20/10

Loc: Spirit Lake, Idaho
Re: Post your home made scope new [Re: DonnyM]
      #5974543 - 07/16/13 04:25 PM Attachment (110 downloads)

Here is another one. It started life as a Camera Lens in a airplane. Then it made its way to Surplus Shed. I bought it and put it to good use.
I made a mount for it with a Dovetail for a red dot. I added stops to it so you could lock the focus and zoom. I also added a Aluminum helical focuser that I modified to work. It can use 2" eye pieces or my Sony or Canon DSLR's.
It is a 6.1" triplet with a negative doublet and two more lenses to shorten the length. At full wide it is f0.5 and at full zoom its f1.2. And yes that is a 6.1" dia objective. It weighs 18.8 lbs. Allot of high quality glass.

Donny


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: DonnyM]
      #5979475 - 07/19/13 09:48 AM

here's a travel dob almost finished roughing out. love the front collimation bolts.







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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: Post your home made scope new [Re: Pinbout]
      #5980930 - 07/20/13 06:11 AM

Very cool Danny I like it. Couple questions? What focuser are you using and Do you have a more detailed shot of your mirror cell?

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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: cpr1]
      #5981507 - 07/20/13 02:12 PM

A kineoptic 1. This is the scope in my warehouse 8in for bicycle. I'm not finished on the cell. But the plan is to glue a ball bearing to the ply the chamfer the pivot hole in the teeter totter. And use guide pins under the supports to keep the bars from spinning. Its a strock float support idea.
The mirror sits on the trianglr cell which pushes way from the rocker plate, via springs, and the thumd screws draw it up. Side support is still being debated in my head, I just hate when the voices start yelling at each other.


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UncleMossy
super member


Reged: 02/08/12

Loc: Downtown Toronto
Re: Post your home made scope new [Re: kfrederick]
      #5992079 - 07/26/13 10:07 PM

Quote:

Here is my 17inch f9 Wide Band Chief




Very nice.
Every Chief I see intrigues me.
The design seems to have a lot on the upside with no obstruction and a more convenient eyepiece height but what, if any, are the downsides?
Is it that the angled light path needs correcting?
Just curious.

Cheers
Jim


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Eden Orion
member


Reged: 02/23/07

Loc: Qoranit, Israel
My Latest scope: 80 mm f/11 Refractor new [Re: droid]
      #5994263 - 07/28/13 08:20 AM Attachment (112 downloads)

Just finished another telescope.
It is based on an objective that was recommended here some months ago. a 80 mm f/11 achromatic lens from Surplus Shed.
Since I'm lecturing a lot in front of children about the history of the telescope, I decided to build it with an open tube.
It is made from 19-20 mm Baltic birch plywood .
The design was done with Sketchup.

Pictures of the process can be seen here:

http://picasaweb.google.com/100018954367956374706/80MmF11OpenTubeRefractor?au...

The scope functions very good at night (beautiful contrast on full moon) and with 45 prism also as a spotting scope.

Eden


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: kfrederick]
      #6003788 - 08/02/13 07:26 PM

Kevin,

when are we going to see the 24" scope? why isn't it done yet?


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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: Pinbout]
      #6005945 - 08/04/13 08:14 AM Attachment (89 downloads)

Here is my 5" f15 D & G refractor finally ready for first light. The tube is 3mm marine ply similar to my earlier projects. I've adapted the mount from the 5" f12 Istar temporarily.

For this D & G I have used a 2.5" Feather Touch focuser.


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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: plyscope]
      #6005947 - 08/04/13 08:18 AM Attachment (64 downloads)

First light was brief due to the weather but I'm pleased with the view of Saturn and a quick look at the Jewel Box and Omega Centauri. Excellent contrast and minimal CA.

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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: plyscope]
      #6006944 - 08/05/13 01:40 AM Attachment (81 downloads)

This picture shows how the tube is constructed. This time I cut out the corners of the baffles to allow for air circulation outside the light path as described by Jeff B.

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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: plyscope]
      #6008685 - 08/06/13 12:57 AM

That's a great idea, Andy! (and Jeff B)!

-Tim.


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plyscope
Pooh-Bah


Reged: 11/23/06

Loc: Perth, West Australia
Re: Post your home made scope new [Re: tim53]
      #6018631 - 08/11/13 08:24 AM Attachment (100 downloads)

Here is another picture from today. The tube rings (octagons!) are 3/4 inch ply made over the last couple of days. The mount is a home made alt/az on a permanent pier that I normally use with my 6" D & G.

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Deep13
Carpal Tunnel
*****

Reged: 01/25/05

Loc: NE Ohio
Re: Post your home made scope new [Re: bremms]
      #6047993 - 08/26/13 11:50 PM

Quote:

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.




Looks familiar. Do you remember a scope you built for a 5" f/12 D&G lens with a brass focuser? You sold it some 10 years ago. Very sharp planet scope. I have a set of ZAO IIs that work very well with it.


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timfiskwa
member


Reged: 12/22/07

Loc: Richardson, TX
Re: Post your home made scope new [Re: Deep13]
      #6059221 - 09/02/13 12:57 PM

Here is my Meade DS-10 mated with a Discovery Altitude bearings and home made swivel base with LP record and Teflon action. Very basic design. It has served me well. I get good views of what can be seen in the Dallas light dome.IMG_0157.JPG

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mikey cee
Postmaster
*****

Reged: 01/18/07

Loc: bellevue ne.
Re: Post your home made scope new [Re: timfiskwa]
      #6059728 - 09/02/13 05:40 PM

Wow!! What more can a person say.

Edited by mikey cee (09/02/13 05:41 PM)


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post your home made scope new [Re: mikey cee]
      #6059789 - 09/02/13 06:27 PM

Quote:

Wow!! What more can a person say.






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