Save up to $300 on ZWO AM5 and AM3 mount packages while supplies last!Save up to $300 on ZWO AM5 and AM3 mount packages while supplies last!

 ECLIPSE ORDERS: New orders will not ship in time. Local pickup orders can be ordered until 1pm PT Sat, Apr 6 and picked up by 2pm. 

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Discontinued Products

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  1. Discontinued
    Agena Piggyback Camera Adapter
    Agena Piggyback Camera Adapter
    Our Price: $16.95
    Out of Stock
    Free US Shipping Over $25
  2. Discontinued
    Agena Red Light Pen
    Agena Red Light Pen
    Our Price: $5.00 As low as $4.00
    Out of Stock
    Free US Shipping Over $25
  3. Discontinued
    Agena Synta/Vixen Style Dovetail Mounting Base/Shoe for Finders - Flat Base for Takahashi Scopes (Black) # TFURB-B
    Agena Synta/Vixen Style Dovetail Mounting Base/Shoe for Finders - Flat Base for Takahashi Sc...
    Our Price: $27.95
    Out of Stock
    Free US Shipping
  4. Discontinued
    Agena T-Thread Male-to-Male Adapter
    Agena T-Thread Male-to-Male Adapter
    Our Price: $20.00
    Out of Stock
    Free US Shipping Over $25
  5. Discontinued
    Agena Telescope Tube Rings (Set of 2) - 5.6"
    Agena Telescope Tube Rings (Set of 2) - 5.6"
    Our Price: $35.00
    Out of Stock
    Free US Shipping
  6. Discontinued
    Agena Universal Afocal Film / Digital / Video Camera Adapter - For Digital Cameras
    Agena Universal Afocal Film / Digital / Video Camera Adapter - For Digital Cameras
    Our Price: $30.00
    Out of Stock
    Free US Shipping
  7. Discontinued
    Agena Universal Afocal Film / Digital / Video Camera Adapter - For Video Cameras
    Agena Universal Afocal Film / Digital / Video Camera Adapter - For Video Cameras
    Our Price: $35.00
    Out of Stock
    Free US Shipping
  8. Discontinued
    Agena Universal Afocal Film / Digital / Video Camera Adapter
    Agena Universal Afocal Film / Digital / Video Camera Adapter

    Starting at $30.00

    More Info
    Free US Shipping
  9. Discontinued
    Agena Visual Baader Solar Filter - 110mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 110mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $40.00
    Out of Stock
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  10. Discontinued
    Agena Visual Baader Solar Filter - 120mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 120mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $40.00
    Out of Stock
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  11. Discontinued
    Agena Visual Baader Solar Filter - 130mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 130mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $44.00
    Out of Stock
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  12. Discontinued
    Agena Visual Baader Solar Filter - 140mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 140mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $46.00
    Out of Stock
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  13. Discontinued
    Agena Visual Baader Solar Filter - 150mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 150mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $56.00
    Out of Stock
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  14. Discontinued
    Agena Visual Baader Solar Filter - 160mm Cell ID (70mm Off-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 160mm Cell ID (70mm Off-Axis Filter Aperture)
    Our Price: $59.00
    Out of Stock
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  15. Discontinued
    Agena Visual Baader Solar Filter - 160mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 160mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $59.00
    Out of Stock
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  16. Discontinued
    Agena Visual Baader Solar Filter - 200mm Cell ID (70mm Off-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 200mm Cell ID (70mm Off-Axis Filter Aperture)
    Our Price: $70.00
    Out of Stock
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  17. Discontinued
    Agena Visual Baader Solar Filter - 200mm Cell ID (70mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 200mm Cell ID (70mm On-Axis Filter Aperture)
    Our Price: $75.00
    Out of Stock
    Free US Shipping
  18. Discontinued
    Agena Visual Baader Solar Filter - 225mm Cell ID (70mm Off-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 225mm Cell ID (70mm Off-Axis Filter Aperture)
    Our Price: $75.00
    Out of Stock
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  19. Discontinued
    Agena Visual Baader Solar Filter - 92mm Cell ID (50mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter - 92mm Cell ID (50mm On-Axis Filter Aperture)
    Our Price: $35.00
    Out of Stock
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  20. Discontinued
    Agena Visual Baader Solar Filter for Finders and Binoculars - 70mm Cell ID (30mm On-Axis Filter Aperture)
    Agena Visual Baader Solar Filter for Finders and Binoculars - 70mm Cell ID (30mm On-Axis Fil...
    Our Price: $21.00
    Out of Stock
    Free US Shipping Over $25
  21. Discontinued
    Agena Webcam Adapter for Eyepiece Projection Photography
    Agena Webcam Adapter for Eyepiece Projection Photography
    Our Price: $20.00
    Out of Stock
    Free US Shipping Over $25
  22. Discontinued
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: Type 1
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: T...
    Our Price: $40.00
    Out of Stock
    Free US Shipping
  23. Discontinued
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: Type 2
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: T...
    Our Price: $40.00
    Out of Stock
    Free US Shipping
  24. Discontinued
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: Type 3
    Agena Webcam Adapter for Eyepiece Projection Photography - Webcam Thread-to-1.25" Adapter: T...
    Our Price: $40.00
    Out of Stock
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Category
Product Banner Type
  1. clearance 3 items
  2. closeout 1 item
  3. discontinued 2083 items
  4. new 8 items
Adapter Specifications
  1. 1.25" Eyepiece Holder 8 items
  2. 1.25" Nosepiece 8 items
  3. 2" Eyepiece Holder 21 items
  4. 2" Nosepiece 11 items
  5. M28.5 (1.25" Filter) Thread - Female 2 items
  6. M48 (2" Filter) Thread - Male 15 items
  7. M48 (2" Filter) Thread - Female 31 items
  8. T / T2 Filter Thread - Male 18 items
  9. T / T2 Filter Thread - Female 17 items
  10. SCT Thread - Male 7 items
  11. SCT Thread - Female 29 items
  12. C / CS Thread - Male 1 item
  13. M12 Webcam Thread - Male 2 items
  14. Meade ETX Thread - Female 2 items
  15. Miscellaneous Thread - Male 41 items
  16. Miscellaneous Thread - Female 5 items
Dovetail Design/Series
  1. Other 2 items
  2. V Series (Vixen) 19 items
  3. D Series (Losmandy) 2 items
  4. DV Series 3 items
  5. Arca-Swiss 6 items
Accessory Size
  1. 1.25 inch 89 items
  2. 2 inch 95 items
  3. 31mm Round Unmounted 14 items
  4. 36mm Round Unmounted 16 items
  5. 50.4mm Round Unmounted 7 items
  6. 50mm Square Unmounted 7 items
  7. DSLR Clip On - Canon EOS APS-C 8 items
  8. DSLR Clip On - Canon EOS FF 6 items
  9. DSLR Clip On - Nikon D5000/D5100 5 items
  10. DSLR Clip On - Nikon D7000/D7100 5 items
  11. Hybrid 5 items
  12. SCT 9 items
Color
Eyepiece Field of View
  1. Up to 50 degrees 67 items
  2. 51 - 60 degrees 82 items
  3. 61 - 70 degrees 57 items
  4. 71 - 80 degrees 4 items
  5. Over 80 degrees 73 items
Focuser Scope Type
  1. Reflector 4 items
  2. Refractor 3 items
  3. SCT 4 items
Telescope Mount Type
  1. No Mount (OTA Only) 66 items
  2. Alt-Azimuth (AZ) 26 items
  3. Equatorial (EQ) 21 items
  4. Fork (Dual Arm) 5 items
  5. Fork (Single Arm) 19 items
  6. Dobsonian 12 items
Binocular Prism Type
  1. Porro Prism 16 items
  2. Roof Prism 29 items
Manufacturer
  1. 3D Astro Accessories 15 items
  2. 3DiBari 1 item
  3. Agena Astro 66 items
  4. All Other 20 items
  5. Antares 39 items
  6. Antlia Filters 7 items
  7. Artesky 15 items
  8. Askar 5 items
  9. Astro Hutech 9 items
  10. Astrodevice 1 item
  11. Astrodymium 13 items
  12. Astronetics Design 1 item
  13. AstroPixels Publishing 6 items
  14. Baader Planetarium 94 items
  15. Blue Fireball 27 items
  16. Bob's Knobs 6 items
  17. Brandon / Vernonscope 10 items
  18. Bresser 7 items
  19. BST 2 items
  20. Celestron 313 items
  21. Coronado 30 items
  22. Cosmostory 1 item
  23. David Chandler Company 5 items
  24. DayStar Filters 4 items
  25. Dew-Ninja 1 item
  26. Dew-Not 2 items
  27. Explore Scientific 53 items
  28. Farpoint Astronomical 13 items
  29. GSO 25 items
  30. HoTech 6 items
  31. Howie Glatter 9 items
  32. IDAS Filters 2 items
  33. iOptron 10 items
  34. Kasai Trading Co. 10 items
  35. Kokusai Kohki 16 items
  36. LensPen 39 items
  37. Levenhuk 57 items
  38. Lumicon 28 items
  39. Lunt Solar Systems 36 items
  40. Machinza Astro Products 5 items
  41. Masuyama 4 items
  42. Meade 326 items
  43. Noblex / Docter 1 item
  44. Optolong 58 items
  45. Pegasus Astro 20 items
  46. Player One Astronomy 8 items
  47. PrimaLuceLab 1 item
  48. QHYCCD 56 items
  49. Revolution Imager 2 items
  50. Rigel Systems 2 items
  51. Shannon Telescopics 10 items
  52. Sharpstar 6 items
  53. Sky & Telescope 14 items
  54. Sky Watcher 25 items
  55. Spectrum Telescope 1 item
  56. Starlight Instruments 1 item
  57. Tele Vue 37 items
  58. Telrad 1 item
  59. Thousand Oaks Optical 7 items
  60. Unihedron 1 item
  61. Vaonis 1 item
  62. Vixen Optics 64 items
  63. William Optics 234 items
  64. Willmann-Bell 50 items
  65. Zen-Ray 17 items
  66. ZWO Astronomy Cameras 78 items
Binocular Series
  1. Celestron Cavalry 5 items
  2. Celestron Cometron 1 item
  3. Celestron Cosmos 1 item
  4. Celestron Echelon 2 items
  5. Celestron Granite ED 6 items
  6. Celestron Nature DX 3 items
  7. Celestron Oceana 2 items
  8. Celestron Outland X 1 item
  9. Celestron SkyMaster 3 items
  10. Celestron UpClose 4 items
  11. Levenhuk Monaco 4 items
  12. Lunt SunOculars 7 items
  13. Meade Astro 2 items
  14. Zen-Ray ZRS HD 6 items
  15. Zen-Ray Prime HD 2 items
  16. Zen-Ray Vista 2 items
  17. Zen-Ray ED3 3 items
Telescope Series
  1. Askar FMA 1 item
  2. Askar Refractors 2 items
  3. Celestron AstroMaster 4 items
  4. Celestron CGE 1 item
  5. Celestron CGEM 3 items
  6. Celestron CGEM HD 4 items
  7. Celestron CGEM DX 2 items
  8. Celestron CGEM DX HD 2 items
  9. Celestron CGE Pro 3 items
  10. Celestron CGE Pro HD 3 items
  11. Celestron CGX-L 1 item
  12. Celestron CPC 1 item
  13. Celestron FirstScope 3 items
  14. Celestron Inspire 1 item
  15. Celestron LCM 3 items
  16. Celestron NexStar Evolution 1 item
  17. Celestron NexStar SE 1 item
  18. Celestron Omni XLT 3 items
  19. Celestron Omni XLT AZ 3 items
  20. Celestron PowerSeeker 2 items
  21. Celestron RASA 5 items
  22. Celestron SkyProdigy 4 items
  23. Celestron Spotting Scopes 11 items
  24. Coronado PST 2 items
  25. Coronado SolarMax II 11 items
  26. Coronado SolarMax III 11 items
  27. DayStar 3 items
  28. Exp Scientific AR Series 5 items
  29. Exp Scientific Reflectors 4 items
  30. Exp Scientific ED Triplet 8 items
  31. Exp Scientific FirstLight 1 item
  32. Exp Scientific Truss Tube 2 items
  33. GSO Standard Newtonian 4 items
  34. GSO Imaging Newtonian 2 items
  35. Levenhuk Skyline Pro 3 items
  36. Levenhuk Strike Pro 3 items
  37. Lunt Solar Ha 29 items
  38. Meade ETX 8 items
  39. Meade Infinity 6 items
  40. Meade LightBridge Plus 12 items
  41. Meade LightBridge Mini 3 items
  42. Meade LS 4 items
  43. Meade LT 2 items
  44. Meade LX65 9 items
  45. Meade LX70 8 items
  46. Meade LX80 6 items
  47. Meade LX85 14 items
  48. Meade LX200-ACF 2 items
  49. Meade LX850-ACF 1 item
  50. Meade Polaris 6 items
  51. Meade Series 6000 7 items
  52. Meade Spotting Scopes 2 items
  53. Meade StarNavigator 10 items
  54. Meade StarPro AZ 4 items
  55. Sharpstar Newtonian Astrographs 2 items
  56. Sharpstar Refractors 4 items
  57. Sky Watcher Flextube Dobsonian 2 items
  58. Sky Watcher Evolux 2 items
  59. Sky Watcher EvoStar 1 item
  60. Sky Watcher Flextube SynScan Dobsonian 2 items
  61. Sky Watcher Heritage 2 items
  62. Sky Watcher Maksutov 1 item
  63. Sky Watcher ProEd 1 item
  64. Sky Watcher Stargate Dobsonian 4 items
  65. Vaonis Vespera 1 item
  66. Vixen BT 1 item
  67. Vixen Refractors 12 items
  68. Vixen Rxx Reflectors 3 items
  69. Vixen VMC 4 items
  70. William Optics FLT 12 items
  71. William Optics GT 25 items
  72. William Optics GuideStar 1 item
  73. William Optics RedCat 6 items
  74. William Optics Star 3 items
  75. William Optics Zenith Star 36 items
Telescope Aperture
  1. Up to 2" [51mm] 10 items
  2. 2.1 - 3" [76mm] 31 items
  3. 2.1 - 3" [76mm] 46 items
  4. 3.1 - 4" [102mm] 72 items
  5. 4.1 - 5" [127mm] 34 items
  6. 5.1 - 6" [153mm] 28 items
  7. 6.1 - 8" [203mm] 15 items
  8. 8.1 - 10" [254mm] 9 items
  9. 10.1 - 12" [305mm] 15 items
  10. 12.1 - 16" [407mm] 6 items
  11. Larger than 16" 4 items
Telescope Optical Design
  1. Solar 5 items
  2. Advanced Coma Free (ACF) 8 items
  3. Aplanatic Schmidt (EdgeHD) 3 items
  4. Astrograph 3 items
  5. Maksutov-Cassegrain 8 items
  6. Schmidt-Cassegrain 5 items
  7. Cassegrain Reflector 4 items
  8. Newtonian Reflector 34 items
  9. Doublet (Achromat) 34 items
  10. Doublet (Apochromat) 18 items
  11. Triplet (Apochromat) 7 items
  12. Petzval 3 items
  13. Other 2 items
Telescope Focal Length
  1. Up to 300mm 6 items
  2. 301 - 400mm 18 items
  3. 401 - 500mm 12 items
  4. 501 - 600mm 15 items
  5. 601 - 700mm 15 items
  6. 701 - 800mm 8 items
  7. 801 - 900mm 15 items
  8. 901 - 1000mm 12 items
  9. 1001 - 1250mm 11 items
  10. 1251 - 1500mm 4 items
  11. 1501 - 1750mm 5 items
  12. 1751 - 2000mm 11 items
  13. 2001 - 2500mm 9 items
  14. 2501 - 3000m 2 items
Telescope Focal Ratio
  1. Up to f/4 12 items
  2. f/4.1 - f/5 26 items
  3. f/5.1 - f/6 23 items
  4. f/6.1 - f/7 21 items
  5. f/7.1 - f/8 8 items
  6. f/8.1 - f/9 2 items
  7. f/9.1 - f/10 26 items
  8. f/10.1 - f/11 3 items
  9. f/11.1 - f/12 8 items
  10. f/12.1 - f/13 6 items
  11. Greater than f/13 8 items
Eyepiece Focal Length
  1. 5mm and Under 46 items
  2. 5.1mm - 10mm 78 items
  3. 10.1mm - 15mm 49 items
  4. 15.1mm - 20mm 45 items
  5. 20.1mm - 30mm 51 items
  6. 30.1mm - 40mm 28 items
  7. 40.1mm and Higher 3 items
  8. Variable Range 8 items
Experience Level
  1. Beginner 61 items
  2. Intermediate 61 items
  3. Advanced 16 items
Dovetail Length
  1. Up to 4" 2 items
  2. 4.1" - 6" 1 item
  3. 6.1" - 8" 2 items
  4. 8.1" - 10" 5 items
  5. 10.1" - 12" 1 item
  6. Greater than 14" 1 item
Stock
  1. In Stock 24 items
  2. Out of Stock 2099 items
Price
  1. $0.00 - $10,000.00 2120 items
  2. $10,000.00 - $20,000.00 3 items
$ - $