• Lumicon 2" Mirror Diagonal w/celestron 25 MM plossl eye piece

    Used but excellent condition diagonal and eyepiece
    C $2.88
    2 bids
    C $35.05 shipping
    Ending Monday at 16:34 EST1d 11hFrom United StatesCustoms services and international tracking provided
  • 1.25 inch 31.7mm PLOSSL 6mm Multicoated Eyepiece Lens for Astronomy telescope

    Optical System:Plossl type. 1XPL6mm eyepiece lens. lens meterial:optical glass lens. We are Visionking Optical Technology CO., LTD.
    C $11.52
    Top Rated Seller
    Free shipping
    From China
  • New ListingVintage Edmund 8" Telescope Mirror with Mount

    Mirror is 8" in diameter and 1 3/8" thick. 48.1" etched on side which i believe is the focal length. Mount is 9 1/8" in diameter.
    C $38.37
    1 bid
    C $45.98 shipping
    Ending Saturday at 15:18 EST6d 10hTop Rated SellerFrom United StatesCustoms services and international tracking provided
  • 16" f/4.5 Sandwich Parabolic Telescope Mirror

    Although the air condition was terrible due to middle of rainy season, optical performance was exactly as I expected! The surface of Jupiter was amazing. Contrast of color was deep and details were very sharp, image edge was knife cutting, even through hazy bad seeing.
    C $1,153.08
    From Hong Kong
    C $131.96 shipping
  • Lumicon 2" Mirror Diagonal

    This 2" Lumicon Diagonal comes with 2" to 1.25" Adapter, compression ring for perfect centering and protection of eyepiece ( eyepiece not included ).
    C $76.86
    0 bids
    C $13.67 shipping
    Ending Wednesday at 17:00 EST3d 12hFrom United StatesCustoms services and international tracking provided
  • Diagonal adapter 1.25''erecting image prism for astronomical telescope eyepiece~

    Prism Glass Material:glass. High quality optical glass come with dust cover: Keep your lens clean and image clear and sharp. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
    C $5.62
    Top Rated Seller
    Free shipping
    From China
  • GSO 12" f/4 Parabolic Primary and 88mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $1,024.96
    Top Rated Seller
    C $90.44 shipping
    From United States
    Only 1 left!
  • 76mm Parabolic Primary and 19mm Secondary Mirror Set for Telescope #Z950 ZY

    Parabolic Primary Mirror - 76mm. Elliptical Secondary Mirror - 19mm. Focal length of the primary mirror: 900mm. This set contains the following products Rate (item arrived).
    C $57.40
    Top Rated Seller
    C $10.89 shipping
    From China
    37 watching
  • Vixen Telescope Accessories Correcting Lens 45 Erecting Prism 31.7 8791-06 New D

    – Is A Prism That Can Be Seen In Erect Image. Our Products are 100% Authentic.
    C $89.61
    Top Rated Seller
    Free shipping
    From Japan
  • GSO 8" f/6 Parabolic Primary and 50mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $301.08
    Top Rated Seller
    C $54.17 shipping
    From United States
  • GSO Parabolic Primary Mirror - 6" f/6

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $202.43
    Top Rated Seller
    C $29.83 shipping
    From United States
    5 watching
  • GSO 8" f/4 Parabolic Primary and 70mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $371.55
    Top Rated Seller
    C $57.27 shipping
    From United States
    19 watching
  • GSO 6" f/5 Parabolic Primary and 50mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $237.02
    Top Rated Seller
    C $44.43 shipping
    From United States
    7 watching
  • GSO Parabolic Primary Mirror - 6" f/4

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $280.58
    Top Rated Seller
    C $29.83 shipping
    From United States
  • GSO Parabolic Primary Mirror - 8" f/4

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $294.68
    Top Rated Seller
    C $54.17 shipping
    From United States
    7 watching
  • GSO Parabolic Primary Mirror - 12" f/4

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $884.03
    Top Rated Seller
    C $90.44 shipping
    From United States
    Only 1 left!
  • GSO Parabolic Primary Mirror - 10" f/5

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $375.39
    Top Rated Seller
    C $75.53 shipping
    From United States
    17 watching
  • GSO Parabolic Primary Mirror - 6" f/5

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $189.62
    Top Rated Seller
    C $29.83 shipping
    From United States
  • GSO 16" f/4.5 Parabolic Primary and 88mm Secondary Mirror Set for Telescope

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $1,819.30
    Top Rated Seller
    C $136.74 shipping
    From United States
  • GSO 10" f/5 Parabolic Primary and 62.5mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $429.20
    Top Rated Seller
    C $69.56 shipping
    From United States
    39 watching
  • GSO 10" f/4 Parabolic Primary and 88mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $768.72
    Top Rated Seller
    C $72.54 shipping
    From United States
  • GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for SCT Telescope

    GSO's 2" SCT diagonal features dielectric coatings with 99% reflectivity across the visible spectrum and a 1/12 wave quartz mirror. The all metal diagonal body is CNC machined. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product.
    C $153.74
    Top Rated Seller
    C $29.83 shipping
    From United States
  • GSO Parabolic Primary Mirror - 12" f/5

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $698.25
    Top Rated Seller
    C $90.44 shipping
    From United States
  • GSO Parabolic Primary Mirror - 6" f/8

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $149.90
    Top Rated Seller
    C $29.83 shipping
    From United States
  • Celestron 2" SCT Mirror Diagonal with XLT coating # 93527

    Product carries full 2 year Celestron factory limited warranty (within US/Canada only). Agena note: To convert this diagonal into a refractor-type diagonal, you can replace the SCT adapter on this diagonal with one of the two 2" adapters listed on the 'Related Products' tab above (William Optics 2" nosepiece or Blue Fireball 2" spacer. ).
    C $166.49
    Top Rated Seller
    C $44.43 shipping
    From United States
  • GSO Parabolic Primary Mirror - 16" f/4.5

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $1,665.56
    Top Rated Seller
    C $136.74 shipping
    From United States
  • Baader T-2 90° Prism Star Diagonal Body # T2-01C 2456005

    Manufacturer part number: T2-01C or 2456005. It's also the perfect diagonal for the Baader / Zeiss Giant Binoviewer (it replaces the normal prism diagonal) as well as the Baader Maxbright Binoviewer.
    C $167.84
    Top Rated Seller
    C $18.87 shipping
    From United States
  • GSO 12" f/5 Parabolic Primary and 70mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $755.91
    Top Rated Seller
    C $90.44 shipping
    From United States
  • 20" f/4.1 Sandwich Parabolic Telescope Mirror

    The mirror structure has been optimized using the advanced Finite Element Analysis Modeling. It has very short thermal equilibrium time even without fan. Although the air condition was terrible due to middle of rainy season, optical performance was exactly as I expected!
    C $3,907.66
    From Hong Kong
    C $180.65 shipping
    or Best Offer
  • Telescope PRIMARY MIRROR

    Telescope PRIMARY MIRROR 11.0'' Diameter x .600'' Center thickness Radius of 10.00'' concave with a 1.800'' Center hole. I will cut the diameter to 10.500'' to remove chips on concave side
    C $576.54
    From United States
    C $43.11 shipping
    Customs services and international tracking provided
    or Best Offer
  • GSO Elliptical Secondary Mirror - 80mm

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $130.68
    Top Rated Seller
    C $18.87 shipping
    From United States
  • New LOW PRICE #### 12 inch THIN EDGE PYREX Telescope Mirror Blank ####

    Blank is generated for an F/6. Has a defect on the edge BUT does not go into the clear aperture.
    C $397.17
    From United States
    C $104.16 shipping
    Customs services and international tracking provided
    or Best Offer
  • 14" f/5 Sandwich Parabolic Telescope Mirror

    Austria 70. Although the air condition was terrible due to middle of rainy season, optical performance was exactly as I expected! The surface of Jupiter was amazing. Contrast of color was deep and details were very sharp, image edge was knife cutting, even through hazy bad seeing.
    C $832.78
    From Hong Kong
    C $115.31 shipping
  • 18" f/4.5 Sandwich Parabolic Telescope Mirror

    Although the air condition was terrible due to middle of rainy season, optical performance was exactly as I expected! The surface of Jupiter was amazing. Contrast of color was deep and details were very sharp, image edge was knife cutting, even through hazy bad seeing.
    C $2,690.52
    From Hong Kong
    C $156.31 shipping
    or Best Offer
  • 24" f/3.3 Sandwich Parabolic Telescope Mirror

    I’ve tried buying fast 8” mirrors twice through A-mart and both were dogs – terribly undercorrected, probably spherical. This mirror is way different. Stars are near pinpoints and there is no tendency to astigmatism (at least nothing that didn’t come from my eyes).
    C $9,609.00
    From Hong Kong
    C $180.65 shipping
    or Best Offer
  • William Optics 1.25" 90-deg Erecting Prism Diagonal w/ Helical Focusing D-EP90-1

    The diagonal features a helical focusing mechanism for fine adjustment of up to 15 mm in the eyepiece holder. The inside of the erecting diagonal is matte blackened to reduce internal stray light reflection and keep image contrast high.
    C $90.97
    Top Rated Seller
    C $18.87 shipping
    From United States
  • GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring - NEW

    This beautiful1.25" mirror diagonal features a BK7 mirror that is precision ground to a flatness of 1/10th wave (minimum) and features dielectric 6-layer enhanced silver coatings with an over-coat protective layer for a light efficiency of over 99% reflectivity across the entire visual spectrum.
    C $88.40
    Top Rated Seller
    C $18.87 shipping
    From United States
  • Televue 2" Diagonal Mirror USED Great Condition

    Setscrew models.
    C $139.97
    From United States
    Was: Previous PriceC $147.34
    Customs services and international tracking provided
    C $41.29 shipping
    or Best Offer
  • Nice 8” Concave mirror optics looks military

    Up for sale is a Nice 8” Concave mirror optics looks military. Mirror is in good used condition. The overall thickness of this assembly is about 2.5” and the overall width is about 11.5” I would guess that the overall diameter of the glass piece is at least 9”.
    C $288.27
    From United States
    C $82.66 shipping
    Customs services and international tracking provided
    10 watching
  • EDMOND OPTICS - Parabolic Mirror - 3" f/6

    Parabolic Mirror - 3" f/6. EDMOND OPTICS.
    C $224.21
    Top Rated Seller
    C $28.28 shipping
    From United States
    or Best Offer
    Customs services and international tracking provided
  • GSO 6" f/8 Parabolic Primary and 31mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $192.18
    Top Rated Seller
    C $44.43 shipping
    From United States
  • GSO 6" f/6 Parabolic Primary and 50mm Secondary Mirror Set for Telescope

    All mirrors have a reflective aluminum coating with a reflectivity of 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors.
    C $249.83
    Top Rated Seller
    C $44.43 shipping
    From United States
    3 watching
  • Tele Vue 1.25" 60-deg Everbrite Erect Image Diagonal # DPC-6012

    It's a real breakthrough for birding and terrestrial viewing; the perfect combination of comfort and performance. Al came up with this very desirable accessory while playing at the Winter Star Party.
    C $307.49
    Top Rated Seller
    C $18.87 shipping
    From United States
    3 watching
  • Meade Series 5000 2" Enhanced Dielectric Diagonal with SCT Adapter # 07680

    The best diagonal for Meade LX90 and LX200 models. Features an incredible 99% reflectivity over the visual spectrum. For spectacular views of the universe, use the best diagonal on the market - Series 5000.
    C $192.18
    Top Rated Seller
    C $44.43 shipping
    From United States
  • Tele Vue 1.25" 90-deg Everbrite Star Diagonal # DPC-1250

    Everbrite mirror coating. This exotic, dielectric, nonmetallic coating is. The diagonal bodies of each are machined from solid blocks of aluminum. Permanent alignment is assured. Both the 1¼" and 2" models feature brass clamp rings, anti-reflection threads and 1¼" and 48mm filter threads respectively.
    C $230.62
    Top Rated Seller
    C $18.87 shipping
    From United States
    Only 1 left!
  • Baader 2" Clicklock Mirror Star Diagonal for Telescope # CLDIAG-2 2956100

    New manufacturer part number: CLDIAG-2 or 2956100 (Old part number MAX-2C). Manufacturer part number: CLDIAG-2 or 2956100. With their ground-breaking introduction several years ago of the all-dielectric 2" Maxbright star diagonal, Baader Planetarium brought mirror star diagonals into the 21st century.
    C $383.08
    Top Rated Seller
    C $18.87 shipping
    From United States
  • GSO Parabolic Primary Mirror - 8" f/6

    Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. This very smooth mirror surface results in excellent optical performance with practically no light scatter.
    C $262.65
    Top Rated Seller
    C $54.17 shipping
    From United States
  • Baader 2" Clicklock BBHS Dielectric Mirror Star Diagonal # MAX-2S 2456115

    Compared to aluminum coatings, even 'enhanced' aluminum, silver has very high and uniform reflectivity across the visual spectrum and beyond into the infrared and ultraviolet. It can also be threaded directly onto the back of Meade and Celestron Schmidt-Cassegrain scopes with an optional Baader SCT LockRing.
    C $626.51
    Top Rated Seller
    C $18.87 shipping
    From United States