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18 Nov 2018

Views: 1921


For Sale 75" Low Expansion Telescope Blank Corning Glassworks

By: gatorengineer Location: Pittsburgh PA Area

Not a typo. Over 2 yards of fun for someone. Kev and I have to settle for 71" the hard way. This one is not going...

08 Jan 2020

Updated: 13 Feb 2020

Views: 1059


For Sale 30 inch f/5 Astro Sitall Mirror

By: redman2 Location: San Angelo, Texas

30 inch f/5 Astro Sitall Mirror Specifications - - - Material - - Astro Sitall. Coefficient of thermal expansion is...

21 Apr 2021

Views: 453


For Sale 39 inch blank

By: wrecker_0 Location: La grange Tx 78945

39 inch Borosilicate 2 in think blank ground to near F 4.5 . Includes tooling and machine to grind and polish mirror....

27 Apr 2019

Updated: 13 Nov 2020

Views: 842



By: ARA AVEDISSIAN Location: Northern Arizona

A 24inch mirror done by master optician none other than John Hall of Pegasus Optics. 24" f 4.5, 108 inch focal length...

06 Jun 2020

Updated: 20 Nov 2020

Views: 1158


For Sale Premium 23 inch diameter f/4.74 primary mirror

By: Jedi Dan Location: Illinois

An exquisitely figured ultra low expansion full thickness radially ribbed primary mirror at a phenomenally low price....

25 Apr 2018

Updated: 25 Apr 2018

Views: 1223


For Sale Glass blanks for sale

By: AstroDxtr54 Location: Arizona

1- 22 1/2" Pyrex blank, 3 1/2" thick, center hole, with finished 21 1/2" Maksutov Corrector Plate (the plates the har...

29 Oct 2020

Updated: 12 Nov 2020

Views: 500


For Sale Complete 20" f/5 parts, brand new everything!

By: Edobson20 Location: Datil, NM

Torus OMI 20" f/5 mirror new in box. 3.5" Antares 1/30th wave new. Brand new Astrosystems spider and matching seconda...

29 Sep 2017

Views: 991


For Sale 20" f/4 Mirror plus secondary

By: RickDarden Location: Key Largo Florida

Hello All, As you know, Florida was hit with Irma. We fared OK here in Key Largo. The mirror (and all my astro stuff...

24 Nov 2018

Updated: 27 Nov 2018

Views: 776


For Sale Lockwood 16” F4 Quartz 1” thick with 3.5” secondary

By: SACK Location: Terrell Texas

Howdy I purchased this from Lockwood Custom Optics about 3.5 years ago. Enjoyed it immensely. Pics are coming of this...

23 Nov 2020

Updated: 30 Dec 2020

Views: 637


For Sale 16” R.F.Royce Dall Kirkham Cassegrain mirror set in excellent condition.

By: Toby44 Location: Shelford, Victoria, Australia

Primary mirror is 16” F4 conical mirror. Secondary is 4” spherical mirror with a total focal length of F18. The prima...

24 May 2017

Views: 1141


For Sale 24" f/4.1 Mirror

By: Steve Dodds Location: Salt Lake city

For sale a 24" f/4.1 Focal Length 99.25" 2" thick fine annealed Pyrex. Enhanced Aluminum (96%) coating. Tested by dou...

04 Feb 2021

Updated: 01 Jul 2021

Views: 1274


For Sale Questar Seven Original Mount (Reduced)

By: Optics Patent Location: DFW Texas

Questar Seven Mount Depicted barrel not included. Rare offering of mount only, never seen offered before. Very earl...

01 Jan 2021

Views: 594


For Sale Exceptional 20" f4.2 Primary 1/16th Wave

By: mcwolfson Location: Ottawa, Canada

Mirror has been refigured and recoated by Normand Fullum. Quality of the optics, Strehl = .991 and weighs 37 pounds,...

16 Oct 2017

Views: 1100


For Sale 22.5" Pyrex Telescope Primary Mirror & Matching 4" Secondary

By: ruachsheavens Location: 60050

This is the end of a dream. Recent diagnosis of issues with 3 discs in my back necessitate this sale. This mirror and...

06 Sep 2020

Views: 797


For Sale 20-inch Maksutov corrector lens

By: ThomasMM Location: Danville, CA 94526

For Sale 20-inch Maksutov corrector lens. This has been on an going project for some 20-years. Time is up. Requires a...

03 Dec 2017

Views: 1367


For Sale ZERODUR optical mirror

By: JeanpierreG Location: Belgium

For sale; Two 16,5 inch F1 ZERODUR Mirrors Thickness 4,5 inchorigine Waferstepper Philips factory Eindhoven (Netherl...

12 Nov 2020

Views: 390


For Sale Torus OMI 20" f/5 primary new in box.

By: Edobson20 Location: Datil, NM

Never used still in box Torus primary f/5 Perfect. Have another add with all the rest of the scope plus this mirror....

30 Aug 2017

Views: 1016


For Sale 24" f/4.1

By: Steve Dodds Location: Sal;t Lake City

For sale a 24" f/4.1 Focal Length 99.25" 2" thick fine annealed Pyrex. Weight 68lbs. Tested by Double pass autocollim...

08 Mar 2020

Updated: 08 Mar 2020

Views: 747

Offer Pending

For Sale 24 in Cass

By: wrecker_0 Location: Lagrange Texas

Time for spring cleaning. 24 in full thickness Cass with 17 in Byers drive. Needs a home

26 Mar 2020

Views: 691


For Sale Objective C 110/750 Carl Zeiss Jena

By: lusen Location: Germany Deggendorf

CARL ZEISS JENA Objective Lens C 110/750 COMETFINDER-Objectiv Nr. 62141 it is the last one Cometfinder C 110/750 -...

05 Mar 2018

Views: 740


For Sale Recently Finished 17.5" F /4.5 Primary Mirror by Steve Swayze

By: ruachsheavens Location: 60050

I sent this mirror off to Steve Swayze for re-figuring and it came out very, very nice according to him (have paperwo...

25 May 2017

Views: 1981


For Sale It’s just not a big telescope mirror, it’s a piece of history….

By: Rexcat Location: New Berlin, Wisconsin

It’s just not a big telescope mirror, it’s a piece of history…. The Milwaukee Astronomical Society purchased a blank...

25 Aug 2020

Views: 566


For Sale 3 Kilns For Saale - Up To 40 - Electronic Controller

By: wrecker_0 Location: La Grange, Texas

3 separate kilns for sale. Has electronic controller! 1 is 40 inches in diameter. Can be used to cast or slump or ann...

31 Dec 2017

Views: 524


For Sale 25" dia. x 2 1/8" thick Pyrex Mirror Blank

By: Scott Milligan Location: Hubbardston MA

25" dia. x 2 1/8" thick Pyrex Mirror Blank sourced from United Lens. Edged round and beveled, one side generated fla...

19 Feb 2019

Updated: 20 Feb 2019

Views: 604


For Sale 10" Stainless steel vacuum system

By: Stan_kohut Location: North east Ohio

I have a 10" Stainless double wall "for cooling I imagine" vacuum chamber, with a valve to close off the Diffusion Pu...

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