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18 Nov 2018

Views: 1872


$50,000.00

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...

13 Oct 2020

Views: 502


$11,111.11

For Sale Tube and carrier for 8" Newtonian


By: MikeBY Location: Huntington Beach, CA

Greetings, For sale is a handcrafted telescope tube to make an 8" long tube Newtonian. The tube is made of luan type...

08 Jan 2020

Updated: 13 Feb 2020

Views: 1033

Sold!
$6,000.00

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: 333


$6,000.00

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: 815

Sold!
$5,775.00

For Sale 24" PEGASUS MIRROR W/4" SECONDARY


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: 1118

UPDATED
$5,500.00

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: 1160

UPDATED
$5,000.00

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: 462

UPDATED
$5,000.00

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: 965

Sold!
$4,200.00

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: 751

Sold!
$4,200.00

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: 611

Sold!
$4,000.00

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: 1095


$4,000.00

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...

01 Jan 2021

Views: 556


$3,500.00

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,...

04 Feb 2021

Updated: 11 Apr 2021

Views: 1124

UPDATED
$3,495.00

For Sale Questar Seven Original Mount (Reduced, Reoffered)


By: Optics Patent Location: DFW Texas

Questar Seven Mount (Prior buyer canceled and sacrificed deposit, enabling price reduction). Depicted barrel not in...

16 Oct 2017

Views: 1067

Sold!
$3,200.00

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: 748


$3,200.00

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: 1320


$3,200.00

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: 356


$3,000.00

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: 993

Sold!
$3,000.00

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: 731

Offer Pending
$3,000.00

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: 651


$2,950.00

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: 720

Sold!
$2,600.00

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: 1958

Sold!
$2,500.00

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: 539


$2,500.00

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: 508

Sold!
$2,500.00

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...

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


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