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Today, 01:46 PM

Views: 104


$50.00

For Sale PVC Tube


By: dougm Location: 19122

Got this thin-walled PVC tube for a reflector project, but was actually too big for rings I already have. Needed a 5”...

02 May 2021

Views: 169


$75.00

For Sale 4" 1/20 wave Zerodur Test Flat


By: Steve Dodds Location: Salt lake City

I have several 4" test plates made by Zygo in the 80's and never used. I tested several and they range between 1/20 a...

02 May 2021

Views: 91


$60.00

For Sale 80mm Air-Spaced Achromat


By: MASILMW Location: US

80mm Air-Spaced Achromat The achromat has a focal length of 700mm and is f/8.75. The lenses are fully MgF2 Coated. Ju...

02 May 2021

Views: 133


$335.00

For Sale Meade 10” LX200 classic mount and hand controller


By: woody wood Location: Long Island

Mount has an issue with skipping gears. Just seems to not be locking in at right ascension. The hand control does pow...

30 Apr 2021

Views: 150


$50.00

For Sale [REDUCED] SkyWatcher OEM EQ6R-Pro dual saddle (Losmandy & Vixen)


By: Andrea Salati Location: Jacksonville, FL

Days ago I received and installed an ADM dual saddle so I don't need the original one anymore. As you can see from th...

30 Apr 2021

Views: 242


$225.00

For Sale 6" 1/20 wave Test Flat


By: Steve Dodds Location: salt Lake City

I have several 6" test plates made by Zygo in the 80's and never used. I tested several and they range between 1/20...

24 Apr 2021

Views: 174


$45.00

For Sale Doublet Airspaced Lens 102mm Dia. by 20" focal length


By: starbird Location: 95409

This is a very nice doublet airspaced lens of 102mm diameter and with a focal length of about 20". Makes a nice larg...

23 Apr 2021

Updated: 27 Apr 2021

Views: 466

UPDATED
$20.00

For Sale Odds and Ends


By: randcpoll Location: NY/NJ Border

Orion SteadyPix camera mount (a sturdy all-metal item to attach a camera to shoot through an eyepiece) - SOLD Celest...

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....

12 Apr 2021

Views: 119


$40.00

For Sale 4" f/11.5 Primary Mirror


By: MASILMW Location: US

4" f/11.5 Primary Mirror The focal length is 1173mm. The mirror is made of Pyrex. I do not know if it's spherical or...

11 Apr 2021

Updated: 13 Apr 2021

Views: 400

UPDATED
$275.00

For Sale AT130/F6 OTA and Case


By: Thomas Marshall Location: Prescott Valley AZ.

Brand new OTA/Case/Focuser as sold by AstroTech without optics last year 130mm/F6. $275.00. Can include a ES AR127/6....

29 Mar 2021

Views: 151


$20.00

For Sale Focus Extension Tube 2" with Brass Compression Ring Feature


By: starbird Location: 95409

This is a brand new 2" focus extension tube with a brass compression ring eyepiece capture feature. Brand new unused....

29 Mar 2021

Views: 168


$20.00

For Sale Dovetail Mounting Rail 9 5/8" Long


By: starbird Location: 95409

This is a dovetail mounting rail 9 5/8" long. Great condition. Price is $20.00 plus $3.95 shipping in the USA.

29 Mar 2021

Views: 167


$7.50

For Sale REDUCED 50%! Cover Plates for your Dob, Newt, SCT/MCT or ATM Project....


By: Bob Myler Location: Davisville MO

These large, precision-cut aluminum discs were originally designedto serve as pressure plates for use in a vacuum-sea...

28 Mar 2021

Views: 206


$125.00

For Sale Antares Optical 1.83” Diagonal 1/14 wave enhanced + Curved Spider


By: 042611 Location: CA

Spider for 7” tube. Interferogram and coating graph included. Mirror is RTV’d to holder. Barely used. US and PayPal o...

26 Mar 2021

Updated: 27 Apr 2021

Views: 136

UPDATED
n/a

For Sale FREE Bushnell 130mm x 32" reflector tube


By: Littlegreenman Location: South Pasadena, CA 91030

Free, local pickup only in NE Los Angeles/ Pasadena Arroyo area. NO SHIPPING ID is approximately 130mm Length 83cm...

26 Mar 2021

Views: 133


$10.00

For Sale Crystal Cement Universal #30c


By: ccaissie Location: Maine

One opened box of Universal #30C Crystal Cement sticks. This is more like a mounting pitch, used to temporarily block...

26 Mar 2021

Views: 100


n/a

For Sale Centering Wax by Universal


By: ccaissie Location: Maine

One unopened box of Universal #9 (flexible) black wax sticks. This is more like a mounting pitch, used to temporarily...

26 Mar 2021

Views: 129


$15.00

For Sale Magnesium Carbonate for Preparing for Coating


By: ccaissie Location: Maine

Six blocks of Magnesium Carbonate, mentioned in many discussions of preparation for coating of optics. Used by Stan B...

23 Mar 2021

Views: 105


$15.00

For Sale Cog Belts and Gears


By: MASILMW Location: US

Cog Belts and Gears Includes two each belts and gears. Ideal for 1/4" shafts or smaller if bushings are used. Great f...

23 Mar 2021

Views: 129


$28.00

For Sale 70mm Air-Spaced Achromat in Metal Cell


By: MASILMW Location: US

70mm Air-Spaced Achromat in Metal Cell The focal length is 315mm f/4.5. Made by Carton Optical in Japan. The lenses a...

23 Mar 2021

Views: 143


$30.00

For Sale NEW Carton 4" Telescope Mirrors


By: MASILMW Location: US

NEW Carton 4" Telescope Mirrors 4" f/10 Spherical Made in Japan by Carton Optical Co. From a recent purchaser btw - T...

18 Mar 2021

Views: 170


$20.00

For Sale Tinsley Large Focuser Adapter Plate


By: starbird Location: 95409

This is a Tinsley large focuser adapter plate. When I found it there was a large Tinsley rack and pinion focuser moun...

18 Mar 2021

Views: 136


$20.00

For Sale 60mm Binocular Objective in Rubberized Cell Housing


By: starbird Location: 95409

This is a 60mm binocular objective in the rubberized housing cell. These are about F4 I believe. It is threaded on...

18 Mar 2021

Views: 123


$45.00

For Sale 4" Aluminum Lens Cell for a 102mm Lens


By: starbird Location: 95409

This is a new 4" aluminum lens cell. It fits a 102mm lens. This add is for the cell only no lens. The measurement is...

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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