Telescope Mirrors & Prisms
telescope mirrors & prisms — pre-owned
Browse 88 telescope mirrors & prisms — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.
TeleVue Tele Vue Everbrite 2" Diagonal with 1-1/4" Adapter - USED
D150F750mm parabolic Newtonian Reflector Primary Mirror for Astro telescope DIY
Primary mirror:P arabolic. 1 D150F750 mirror. Surface accuracy： 1/10 λ. Coating：Enhanced aluminum and protective coating.
100pcs 2mm Mini Prism Defective RGB Combiner Prism for DIY Decoration
100pcs Defective Mini P rism Optical Glass Physics Decorative Prism for DIY. Can be use as a Decoration or to Research. We will try our best to resolve any issue.
1.25 in Prism Star Diagonal for Refractor Telescope, Universal Compatible
1.25 in Prism Star Diagonal for Refractor Telescope, Universal Compatible
Dia. 162mm Doublet Optical Lens for DIY Astronomical Telescope.
Hi. For sale is a 162mm diameter doublet lens assembly. There is no name or maker’s mark on it. The lenses are mounted in a “tube” with a built in mounting flange. It is in very good cosmetic condition. The glass is clear and scratch free. There is a small amount of fungus that is starting to form around the outer edges of the lens. I believe this could easily be cleaned if disassembled. Because of the fungus, I am selling it as-is. This would be a wonderful lens for DIY telescope makers.
2 Inch 90 Degree Diagonal Mirror Dielectric Zenith mirror 99% Reflectiv
👁️ 90-Degree Viewing Comfort : Allows for comfortable observing of objects near the zenith (directly overhead), eliminating neck strain. Model: Star Diagonal. It has been thoroughly inspected and is in perfect working order.
You save $8.00
4PCS Defective Optical Glass Color Coating Prism f DIY Decoration Teaching Tools
4PCS Defective Color Coating Optical Glass Prism for DIY Decoration Teaching Tools. Quantity: 4pcs. Can't use on Projector. Material: optical glass. but can be used as teaching tools or research and decorations, they are very beautiful!
You save $0.50
EDMUND 101.6 x 152.4mm EFL 90° Protected Gold 100Å Off-Axis Parabolic Mirror
10PCS Defective Optical Glass Prism Science Research Prisms for DIY Decoration
10pcs Defecive Optical Glass Prism Science Research Decoration Lens. Can't use on Projector. Material: Optical Glass. Can be use as a Decoration or to Ressarch. is provided once the item is dispatched.
You save $0.50
20pcs Mini Defective X-cube Prism for DIY Decoration
20pcs Defective X-cube Prism for DIY Decorative Teaching Tool. Material: glass. is provided once the item is dispatched.
You save $0.50
Celestron Dielectric Star Diagonal 93573 (470615)
Celestron Prism star diagonal 1.25 inch Plate Glass for Refractor Telescope
The resulting image is right side up, but will be reversed from left to right.
Cave Optical Co 12.25" x 2" Spherical Telescope Mirror 36" FL f/2.9 vintage 1968
Back marked36" FL ±2". Edge markedCave Optical Co. ,683638 ,71-3/16" R, andSphere. Approximate focal ratio isf/2.9.
Vintage Pyrex Telescope Mirror Blank - 6”x5/8” or 165mm Approx
Landfill space is becoming an ever-increasing issue so doing what we can now, even in a small way, will help in the long run.
Telescope Star Diagonal 1.25 Inch Black 90 Degree Mirror Accessory
Star diagonal mirror for astronomical telescopes provides a comfortable 90-degree viewing angle, essential for observing objects near the zenith. Features a standard 1.25-inch barrel size compatible with most refractor and Schmidt-Cassegrain telescopes. The durable black composite body includes a chrome-finished insertion tube and a secure thumbscrew to hold eyepieces firmly in place. This essential optical accessory utilizes a high-quality internal mirror to redirect light, ensuring bright and clear upright images for celestial viewing.
You save $1.00
Old Soviet Mirror Galvanometer, 1950s
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2 " 90° Dielectric Diagonal Mirror for Telescope w/ 1.25" Adapter– Metal Body
The included1.25" adapter allows you to use both 2" and 1.25" eyepieces with a single diagonal. Skyoptikst 2" Dielectric Star Diagonal – with 1.25" Adapter. High-Reflectivity Dielectric Coating. Advanced dielectric coating providessuperior reflectivity compared to standard aluminum-coated diagonals.
Meade .965" DS Mirror Telescope Eyepiece Star Diagonal
The Meade .965" DS Mirror Telescope Eyepiece Star Diagonal is an accessory designed for telescopes that features a mirror with a diameter of .965 inches. This star diagonal allows for better viewing of celestial objects by reflecting the light in a way that maximizes contrast and clarity. As part of the Meade brand, this product is known for its quality and compatibility with Meade telescopes, making it a valuable addition to any telescope setup for stargazing enthusiasts. Housing is all plastic construction in great condition has thumb screw and no damage.
Defective Cross Dichroic X-Cube Prism Optical Square Prism RGB Combiner Splitter
1PC 2.5x2.5x3.9cm Defective Optical Dichroic X-Cube Prism RGB Combiner Splitter. Optical Glass RGB Prism, there are four lights, white light in any one of the illuminating surface intake, from the remaining three light shoot out three base colours of red, green and blue, respectively, is said three bases of the light.
You save $0.45
Edmund Scientific 8" f/5 Gold-Coated Parabolic Primary Mirror 1/8 Wave PV 40" FL
As it turned out, however, my 14.7" f/2.9 has a similar enough FOV for night vision that it's redundant, so I decided not to keep this optic. In any case the views/images are relatively unaffected; the mirror still works well enough as-is and it would be easy/cheap enough to strip and re-coat with silver or aluminum.
10pcs Defective Slim Prism PBS DIY Decorative Prism Physics Light Research Glass
10 PCS 33X28X2mm Defective Slim Optical Decorative Prism Physics Light Research Glass. Can't use on Projector because of defective. Can be use as a Decoration or to Research. Material: Optical Glass.
You save $0.35
8 Inch Telescope Primary Mirror
NEWPORT U50-P Series Mount w/25mm Diameter Mirror for Optical Laser Systems
25mm Diameter Mounting Optical Mirror for Optical Laser Testing Systems Used. See attached photos. LM
SVBONY SV188P 2in 90 Degree 99% Dielectric Coated Mirror Diagonal
SVBONY SV188P 2in 90 Degree 99% Dielectric Coated Mirror Diagonal
Meade Starfinder 10" f/4.5 Parabolic Primary/Secondary Telescope Mirrors
44.5" focal length 10" parabolic Pyrex primary mirror and 2.46" minor axis elliptical secondary mirror + holder and spider for a ~12" tube assembly. Will perform best in a 6- or 9-point cell as it's kind of thin.
2PCS Defective Optical Glass Color Coating Prism f DIY Decoration Teaching Tools
2PCS Defective Color Coating Optical Glass Prism for DIY Decoration Teaching Tools. Quantity: 2pcs. Can't use on Projector. Material: optical glass. but can be used as teaching tools or research and decorations, they are very beautiful!
Rainbow-Coated Optical Glass Concave-Convex Magnifying Glass for DIY Decoration
This product is made from optical glass with imperfections (such as bubbles, scratches, chipped edges, or impurities). It can be used for decoration, research, DIY crafts, handmade gifts, etc. Material: optical glass.
You save $1.00
Vintage 7 3/4" Vintage Corning Pyrex Telescope Mirror Blanks - USA
From an old lab clean out Older Pyrex Telescope Mirror blank Appears to be in great shape 7 3/4 inch in diameter Thickness is 1 3/8 inches No chips or cracks See all pics!
SKYOPTIKST HQ ERECT IMAGE PRISM DIAGONAL 2" to 1 1/4" / 2" TELESCOPE EYEPIECES
SKYOPTIKST HQ. ERECT IMAGE PRISM DIAGONAL. Similar to the Williams Optics version that is much more expensive.
Vtg Military 8 inch Pyrex Parabolic Mirror w/ Adjustable Spring-Loaded Base
Polished top of mirror has scuffs from many years of storage and handling, but could possibly be polished.
Vintage Professional Glass Reflector Telescope Surface Mirror Lens Optical Part
The product is a vintage professional glass reflector telescope surface mirror lens, designed for optical parts of telescopes. It is compatible with various brands and is specifically meant for use in reflector telescopes. The optical part is a prism, offering high quality and precision for enhancing the performance of telescopes. This mirror lens helps in reflecting light and images with clarity, making it a valuable accessory for amateur or professional astronomers looking to improve their viewing experience.
100pcs Defective Mini Prism RGB Combiner Prism for DIY Decoration 2mm
100pcs Defective Mini P rism Optical Glass Physics Decorative Prism for DIY. Material: gla s s. is provided once the item is dispatched.
You save $1.45
10pcs Defective Slim Prism for DIY Decorative Prism Physics Light Research Glass
NOTE: Can't use on Projector because of defective. Can be use as a Decoration or to Research. Material: Optical Glass. Defective, with small broken corner. If item is defective after 3 months, you can still send it back to us.
You save $0.41
Skyoptikst 1.25" 90° Erect Image Prism Diagonal for Telescopes – Fully Coated
【Model】: Skyoptikst 90-degree Full Orthographic Prism. We are Skyoptikst Optical Technology CO., LTD. 【Coating】: Optical lenses, fully coated, high definition.
Astronomical telescope 2 inch Diagonal mirror 45 Degree Erecting Prism
Diagonal mirror X1. We are Skyoptikst Optical Technology CO., LTD.
Baader 2" BBHS Mirrored Diagonal with 2" ClickLock Clamp #2456115
I make every effort to describe the item in detail and point out any flaws that I find.
Celestron 1.25in Star Diagonal Metal Telescope Diagonal for Refractor 94115-A
Celestron 1.25in Star Diagonal Metal Telescope Diagonal for Refractor 94115-A
BIG Glass Prism Photo Quality + wooden storage box | U.S. Navy | $58 |
U.S. Navy photo quality optical glass prism. The prism face is 1 1/2" tall. Wooden box. be enlarged as desired.
50PCS Defective Optical Glass Lens Science Physics Research DIY Decoration Prism
You save $1.78
2.2X2.3/2.15cm Defective Optical Glass X-cube Prism for DIY Decoration Teaching
10PCS Defective Color Coating Optical Glass Prism for DIY Decoration Teaching Tools. Can't use on Projector. Material: optical glass. Can be use as a Decoration or to Research. but can be used as teaching tools or research and decorations, they are very beautiful!
You save $1.25