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.
NASA Surplus 16" x 2" Optical mirror blank
Hoya Japanese Telescope/Optical Mirror Blank. Exact measurements are 16 3/8" x 2". NASA surplus optics. Flat on both sides, great for ATM telescope mirror. $40 S&H fee for special packaging.
SVBONY 90 degree diaganol 1.25 inch Metal Prism for Refractor Telescope
great condition!!!!! bt3
Celestron Prism star diagonal 1.25 inch Plate Glass for Refractor Telescope
great condition c
100pcs 2mm/3mm/4mm Mini Prism Defective RGB Combiner Prism f DIY Decoration
100pcs Defective Mini P rism Optical Glass Physics Decorative Prism for DIY. Can be use as a Decoration or to Research. Can't use on Proj ect or.
You save $1.56
OPT 2" SCT Telescope Dielectric Mirror Diagonal 99% Reflectivity GSO
Sold AS IS.
Meade Telescope Secondary Mirror w Dustcap from DS 2000 Series
This is from the DS 2000 Series with D=114mm F=1000mm f/8.8 tube. No cracks or scratches to the mirror.
You save $10.10
20pcs 4x4x7mm 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 $0.60
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 $0.60
15PCS Beautiful Damage Prisms Projector Dichroic Prism for Party Home Decor
Quantity: 15PCS. Can't use on Projector. Material: Optical Glass. Color: Transparent.
You save $0.51
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 $0.54
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.
vintage telescope refractor diagonal mirror eyepiece adapter Japan optical part
You save $2.40
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.
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.
You save $56.10
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.
2 inch Mirror Diagonal 50 for Celestron
If you have any doubts - just ask. What nonsense! We try to declare all issues.
You save $8.00
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.
Explore Scientific 2 inch 99% Reflective Diagonal Lense
For sale is a Explore Scientific 2 inch 90 degree diagonal in unused condition. It is enhanced 99% reflective and will not be the weak link in your visual stream on your telescope. This is a high-quality item and will last for years. It is supplied with the original end caps and locking screws. As always free shipping!
100pcs Defective Mini Prism RGB Combiner Prism for DIY Decoration 2mm/4mm
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 $1.74
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 $1.15
10pcs Defective Long Prism Optical Glass Prism Crafts DIY Decorative Prism
Op tical Glass Prism. Can't use on Projector. Material: Optical Glass. Can be use as a Decoration or to Ressarch.
You save $0.36
203mm Spherical Mirror Lens Newtonian Reflection Astronomical Telescope F1600
Caliber: 203mm. Primary mirror: spherical. Major axis of secondary mirror: 56.5mm. Minor mirror minor axis: 40mm. 1 D203F1600 mirror. 1 40mm second mirror. Focal length: 1600mm.
Vintage 90-Degree Telescope Star Diagonal Prism - Japan
Condition: This item is in used condition. Signs of use include scratches and scuffs. The pictures are taken from the actual item on sale.
Hercules S8239 OAG With Adapters
Never used Hercules S8239 OAG with all thread size adapters.12x12 mm prism.what you see in pics is for sale. Please make sure it will work for your set up as it will need 26mm back focus added to optical train.also will need small allen wrench to change out and for disasembly.cloudy nights has a comparision oag page you can read about it also.thanks for looking.
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!
You save $0.59
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 $0.60
Meade 4504 114mm f/8 Starfinder Telescope Mirror Set w/ Holders Needs Recoating
This includes the primary mirror, the secondary mirror, primary mirror cell and secondary holder and spider with all mounting hardware. The coatings are worn & need recoating but still usable. The holders are excellent!
Celestron 1.25" Star Diagonal W/25mm eyepiece
Celestron 1.25" Star Diagonal W/25mm eyepiece. Good used condition!
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.
Meade .965" DS Mirror Telescope Eyepiece Star Diagonal
Missing the little screw. Pictures are of the actual item.
SVBONY SV223 1.25 inch 90° Mirror Diagonal Clicklock Dielectric 99% Reflective
You save $9.72
GSO 2" telescope Diagonal
GSO diagonal with caps and 1.25 adapter
Baader T-2 BBHS Mirror Diagonal #2456103 with 2" to 1.25" Clicklock Reducer
I make every effort to describe the item in detail and point out any flaws that I find.
Newport Laser Round Pyrex Mirror UPA1-.5
The Newport Round Pyrex Mirror UPA1-.5 is a high-quality telescope mirror designed by the reputable brand NEWPORT. This mirror is specifically designed for use in telescopes and binoculars, providing clear and precise reflections for enhanced viewing experiences. Its round shape and Pyrex construction make it a durable and reliable component for telescope setups, ensuring optimal performance for astronomy enthusiasts and professionals alike. M3-4-25
1PC Defective Big X-Cube Prism Physics Teaching Tools DIY Decoration Education
Defective X-Cube Prism Physics Teaching Tools DIY Decoration Science Learning Education Funny Gadgets Novelty Interesting Toy For Children. Due to all of this prism are defective,Can't use on Projector.
You save $0.90
D114F900 4.5" f/8 Primary & 25mm Secondary Telescope Mirrors + Eyepieces Hadley
Primary mirror tests very well, no significant optical defects and forms a very nice image.
Orion Hybrid Star Diagonal 14008 Telescope Eyepiece Adapter Made in Japan Boxed
This precision-engineered accessory features a 90-degree angle for comfortable viewing and is housed in its original box, reflecting its well-maintained state. MPN: 14008. Model: Hybrid Star Diagonal.
New In Box D203F800 Telescope Mirror Set
The unit is factory-sealed and new in box. · D203F800. Mirror Set. We believe ourWide Product Range will be your selection. · New In Box. New In Box. Product Feature. Product Specifications.
You save $15.00
Old Soviet Mirror Galvanometer, 1950s
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