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Today, 10:15 AM

Views: 143


$48.00

For Sale Mirror blank 12 inch


By: Prasad Location: Near Philadelphia PA

I have a 12 inch diameter 0.75 inch thick mirror blank glass that has been sitting around for a few years. I do not k...

16 Jun 2021

Views: 51


$1.00

Wanted Ebony Star laminate


By: jeanine Location: Utah

Does anyone have a 22"X 22" piece of the original Ebony Star 4552-50 available? Thanks...Lynn

15 Jun 2021

Views: 79


$300.00

For Sale Coherent HeNe laser for Metrology/Interferometry


By: jfrech14 Location: Virginia

I am selling a coherent 31-2017-000 laser head with 31-2470-000 power supply that is a 178mm HeNe that operates on 2...

15 Jun 2021

Views: 43


$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...

14 Jun 2021

Views: 231

Sold!
$200.00

For Sale 8" f4 mirror set, and 1 speed crayford focuser


By: Tyllew96 Location: Thornton Colorado

Selling an 8"f4 mirror set, with a 3d printed secondary holder. Also selling a 1 speed crayford focuser. All are unus...

14 Jun 2021

Views: 142

Sold!
$60.00

For Sale Vintage UNITRON 60mm Objective, Cell, Dew Shield


By: Stan Lopata Location: 13323

Vintage 60mm Refractor Objective, Cell, Dew Shield from the mid 1950s. Includes the mounting screws. In very good c...

13 Jun 2021

Views: 217


$1,500.00

For Sale Aurora Precision Custom Mirror Cell for 18” mirror


By: Solar storm Location: Iowa

Hi all. Up for sale is a custom Aurora Precison adjustable mirror cell for an 18 inch mirror. It is brand new and h...

13 Jun 2021

Views: 124

Offer Pending
$39.00

For Sale ATM 3 Channel Dew Heater $39.00 shipped!


By: Mike G. Location: Oberlin, OH

getting rid of my 3 channel PWM controller for dew heater strips. I built a new power distribution box with a 2 chan...

13 Jun 2021

Views: 40


$30.00

Wanted spider and secondary holder for 6" telescope


By: shootingsta98 Location: RI

I would like to purchase a Novak or similar spider and 1.25" m.a. secondary holder that will fit a 7" ID tube. Let me...

13 Jun 2021

Views: 182

Sold!
$100.00

For Sale 10" Pyrex Mirror Blank


By: Brisby2 Location: Bethlehem, GA

Up for sale is a 10" pyrex mirror blank. I am unsure of the figure of the mirror or the person that ground it, but al...

12 Jun 2021

Views: 304


$75.00

For Sale 4" 1/20 wave Zerodur Test Flats


By: Steve Dodds Location: Salt Lake City

I have several 4" test plates made by Spectra Physics in the 80's and never used. I tested several and they range bet...

10 Jun 2021

Updated: 11 Jun 2021

Views: 376

UPDATED
$25.00

For Sale 80mm achromatic (2)


By: sonny.barile Location: NJ

I have an old pair of Zhumell 20x80 binoculars that are no longer mechanically functional. The glass is all in good c...

10 Jun 2021

Views: 46

Found!
$1.00

Wanted Ronchi Grating


By: Steve Allison Location: Washington

Hi all- I am looking for a small section of Ronchi grating, maybe 125 LPI, for use in the eyepiece of my homemade DP...

10 Jun 2021

Views: 80


$1.00

Wanted Ronchi Grating


By: Steve Allison Location: Washington

Hi people- I am looking to purchase a small section of Ronchi grating, maybe 125 LPI and 3/4 to 1 inch square, for u...

10 Jun 2021

Updated: 11 Jun 2021

Views: 331

Sold!
$150.00

For Sale REDUCED NMT collapsible Truss kit


By: bmcclana Location: CT, USA

I have a New Moon Telescopes collapsible truss kit i purchase several years ago. Have since gone a different directio...

10 Jun 2021

Views: 39


$1.00

Wanted COLLIMATING RINGS


By: Bob Sandy Location: BLUE SPRINGS, MO

WANTED---ONE PAIR OF COLLIMATING RINGS WITH THREE KNOBS EACH RING WITH INSIDE DIAMETER OF NO LESS THAN 110-MM

10 Jun 2021

Views: 372


$100.00

For Sale Two 4.5 inch refractor telescope achromat objectives U.S. made


By: RichA Location: toronto

Two refractor objectives. Uncoated. Maker is American, either Melles Griot or Oriel. From test lab. 4.5 inch 114mm ap...

09 Jun 2021

Views: 147


$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...

09 Jun 2021

Views: 167


$95.00

For Sale Unitron 60mm F15 Doublet Airspaced Lens in Complete Cell


By: starbird Location: 95409

This is a unitron 60mm F15 900mm focal length airs paced lens in the compete push pull lens cell. Both parts of the c...

08 Jun 2021

Views: 41


$1.00

Wanted [WTB] 11-12 Inch Thin Mirror, Preferable Fused Silica Ones


By: kcl31 Location: California

Please let me know if you have one that you'd like to sell. Thanks,

08 Jun 2021

Views: 89


$30.00

For Sale 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...

08 Jun 2021

Views: 86


$35.00

For Sale 80mm Air-Spaced Achromat


By: MASILMW Location: US

80mm Air-Spaced Achromat The achromat has a focal length of 380mm and is f/4.75. The lenses are fully MgF2 Coated. 80...

07 Jun 2021

Views: 249

Sold!
$695.00

For Sale CerVit Mirror Blank, 17.0 inches Diameter by 2.12 inches Thick


By: PeteDCard81 Location: Minneapolis, MN area

CerVit mirror blank, 17.0 inches diameter by 2.12 inches thick. Ground flat on one side. Other side mostly ground ou...

03 Jun 2021

Views: 188


$35.00

For Sale Unitron 60mm Lens Cell


By: jkloeppel Location: Urbana, Illinois

Like I said, I'm cleaning out the last of my Unitron parts. Who would buy a 60mm Unitron lens with a broken rear elem...

03 Jun 2021

Views: 78

Sold!
$20.00

For Sale Unitron 60mm Dew Shield


By: jkloeppel Location: Urbana, Illinois

This Unitron 60mm Dew Shield looks every bit as bad in person (perhaps even worse) as it does in the photograph. Ther...

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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