Jump to content


Photo

Post your home made scope

  • Please log in to reply
593 replies to this topic

#276 Rutilus

Rutilus

    Surveyor 1

  • -----
  • Posts: 1862
  • Joined: 17 Dec 2010

Posted 03 March 2013 - 04:26 AM

Superb woodworking, looks really cool.

#277 Rutilus

Rutilus

    Surveyor 1

  • -----
  • Posts: 1862
  • Joined: 17 Dec 2010

Posted 03 March 2013 - 04:27 AM

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

Attached Files



#278 droid

droid

    rocketman

  • *****
  • Moderators
  • Posts: 7159
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 03 March 2013 - 07:47 AM

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

#279 droid

droid

    rocketman

  • *****
  • Moderators
  • Posts: 7159
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 03 March 2013 - 07:48 AM

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





PVC?

#280 Larry Silvestri

Larry Silvestri

    Sputnik

  • -----
  • Posts: 33
  • Joined: 29 Jan 2013

Posted 07 March 2013 - 11:00 PM

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.

Attached Files



#281 rguasto

rguasto

    Viking 1

  • *****
  • Posts: 767
  • Joined: 18 Nov 2010
  • Loc: Long Island, NY

Posted 08 March 2013 - 07:22 AM

4" F10 with carton mirror

Attached Files



#282 droid

droid

    rocketman

  • *****
  • Moderators
  • Posts: 7159
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 08 March 2013 - 07:25 AM

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

#283 1Old Timer

1Old Timer

    Lift Off

  • -----
  • Posts: 8
  • Joined: 13 Jan 2013
  • Loc: Loveland, CO

Posted 08 March 2013 - 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!

#284 mikey cee

mikey cee

    Cosmos

  • *****
  • Posts: 7990
  • Joined: 18 Jan 2007
  • Loc: bellevue ne.

Posted 08 March 2013 - 12:51 PM

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

#285 Larry Silvestri

Larry Silvestri

    Sputnik

  • -----
  • Posts: 33
  • Joined: 29 Jan 2013

Posted 09 March 2013 - 12:09 PM

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.

#286 droid

droid

    rocketman

  • *****
  • Moderators
  • Posts: 7159
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 09 March 2013 - 12:19 PM

It almost reminds me of Gary Seroniks " The Big Red One: My Optimized 6-inch f/9 Reflector "

Glad it works so good. I was always going going to make one, but alas it never happened :lol:

If you would like to read Garys article:
http://www.garyseronik.com/?q=node/141

#287 gsharper13

gsharper13

    Vostok 1

  • *****
  • Posts: 102
  • Joined: 14 Jun 2007
  • Loc: Belvidere, IL

Posted 11 March 2013 - 03:58 AM

Here are a few to start.
Posted Image

#288 gsharper13

gsharper13

    Vostok 1

  • *****
  • Posts: 102
  • Joined: 14 Jun 2007
  • Loc: Belvidere, IL

Posted 11 March 2013 - 03:58 AM

Posted Image

#289 gsharper13

gsharper13

    Vostok 1

  • *****
  • Posts: 102
  • Joined: 14 Jun 2007
  • Loc: Belvidere, IL

Posted 11 March 2013 - 04:02 AM

http://img.photobuck...13/IMAG0240.jpg

#290 Chuck Hards

Chuck Hards

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5284
  • Joined: 03 May 2010
  • Loc: The Great Basin

Posted 11 March 2013 - 07:53 PM

I found a few pics of past efforts, will keep looking for old photos I haven't scanned yet.

10" all-fiberglass Dobs I built in the late 80's to early 90's.

Posted Image

Posted Image

Posted Image

Posted Image

My "Woodshop" Dob scopes from 1998:

Posted Image

Posted Image

#291 wiserman

wiserman

    Sputnik

  • -----
  • Posts: 43
  • Joined: 04 Mar 2013

Posted 11 March 2013 - 09:27 PM

meade Etx60 lens reversed in meade etx dewcap.
meade ds90 tube with 2" meade focuser.

Folded mirror scope mod to night vision 8mm camcorder via standard eyepiece reflectors, extention tubes and a
25mm x 130mm achromat to refocus

Attached Files



#292 Dick Jacobson

Dick Jacobson

    Viking 1

  • -----
  • Posts: 898
  • Joined: 22 Dec 2006
  • Loc: Plymouth, Minnesota, USA

Posted 12 March 2013 - 07:29 AM

Beautiful fiberglass scopes, Chuck! I'll bet they were lightweight too.

#293 Chuck Hards

Chuck Hards

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5284
  • Joined: 03 May 2010
  • Loc: The Great Basin

Posted 12 March 2013 - 07:41 AM

Beautiful fiberglass scopes, Chuck! I'll bet they were lightweight too.


Thanks Dick!
Some were lightweight, some weren't as light as they could have been, depending on the primary mirror and accessories the individual owners wanted. For example, some of them had 2" thick primary mirrors from Intermountain Optics and heavy-duty Novak cells, some had that heavy, 8x50mm finder that Edmund used to sell in those days. Each had different counterweighting requirements. Any needed balance weight was in the form of lead shot that was over-laminated into the scope interior. Production numbers reached double-digits before the birth of my daughter put a damper on telescope making temporarily.

I contacted S&T at the time, when Roger W. Sinnott was editing the Gleanings dept. IIRC, he liked the scope but felt that making fiberglass patterns and molds didn't have enough appeal to the average ATM, so the article was never written.

#294 Chuck Hards

Chuck Hards

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5284
  • Joined: 03 May 2010
  • Loc: The Great Basin

Posted 12 March 2013 - 09:19 AM

Incidentally, the Woodshop scopes have felt-lined, clamping tube rings made from thick sheet PVC using a router. I mentioned them in another thread.

#295 DanWray

DanWray

    Lift Off

  • *****
  • Posts: 21
  • Joined: 11 Oct 2006
  • Loc: Denver, CO, USA

Posted 14 April 2013 - 12:17 AM

My Carton 80mm f15, Zebra wood tube, dew shield WWII 105mm artillery shell, brass on finder sink drain.

Attached Files



#296 DanWray

DanWray

    Lift Off

  • *****
  • Posts: 21
  • Joined: 11 Oct 2006
  • Loc: Denver, CO, USA

Posted 14 April 2013 - 12:19 AM

another shot

Attached Files



#297 tcmzodiac

tcmzodiac

    Viking 1

  • -----
  • Posts: 585
  • Joined: 11 Nov 2011

Posted 14 April 2013 - 02:18 AM

Posted Image

Posted Image

Posted Image

Posted Image

#298 titanio

titanio

    Mariner 2

  • -----
  • Posts: 267
  • Joined: 15 Feb 2009
  • Loc: Alicante, Spain

Posted 15 April 2013 - 09:24 PM

Hi

Here is my Convertible Newton 16" f4 to Cassegrain 16" f20, this is the Newtonian version on a new CPC mount, the Cassegrain version now is mounted on a Titan mount.

Posted Image


Regards
Toni

#299 mikey cee

mikey cee

    Cosmos

  • *****
  • Posts: 7990
  • Joined: 18 Jan 2007
  • Loc: bellevue ne.

Posted 16 April 2013 - 09:23 AM

Very uptown looking. Plus ingenious design too. ;) Mike

#300 John Jarosz

John Jarosz

    Astro Gearhead

  • *****
  • Posts: 3207
  • Joined: 25 Apr 2004
  • Loc: Fairfax, Iowa

Posted 17 April 2013 - 11:12 AM

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.


Marc,

Nice work, Right after aluminum is machined it will easily buff out to a chrome-like finish. If you wait too long the natural anodizing will make buffing difficult.

Just a thought.

John






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics