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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  1. On Sale
    QHYCCD 30mm f/4.3 Mini Guidescope with Mount for Select QHY5-II/III Cameras - Black
    QHYCCD 30mm f/4.3 Mini Guidescope with Mount for Select QHY5-II/III Cameras - Black
    Sale Price: $103.00 Our Price: $129.00
    In Stock
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  2. On Sale
    Sharpstar 140mm f/6.5 ED Triplet Apo Refractor Telescope # AL-140PH
    Sharpstar 140mm f/6.5 ED Triplet Apo Refractor Telescope # AL-140PH
    Sale Price: $3,499.00 Our Price: $3,999.00
    Out of Stock
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  3. On Sale
    Celestron TrailSeeker 8x32 Binoculars # 71400
    Celestron TrailSeeker 8x32 Binoculars # 71400
    Sale Price: $239.99 Our Price: $279.95
    In Stock
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  4. On Sale
    GSO 12" f/8 Ritchey-Chretien Astrograph Telescope - Truss Tube OTA # RC12-T
    GSO 12" f/8 Ritchey-Chretien Astrograph Telescope - Truss Tube OTA # RC12-T
    Sale Price: $4,299.00 Our Price: $4,499.00
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  5. Closeout
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 6mm # E6W-CU01
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 6mm # E6W-CU01
    Sale Price: $220.00 Our Price: $269.00
    In Stock
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  6. Closeout
    Long Perng 1.25" 55º Long Eye Relief Eyepiece -14.5mm # E14.5LE
    Long Perng 1.25" 55º Long Eye Relief Eyepiece -14.5mm # E14.5LE
    Sale Price: $83.60 Our Price: $95.00
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  7. On Sale
    ZWO FF80 Apo 80mm f/7.5 Petzval Refractor Telescope # FF80-APO
    ZWO FF80 Apo 80mm f/7.5 Petzval Refractor Telescope # FF80-APO
    Sale Price: $1,299.00 Our Price: $1,499.00
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  8. Closeout
    Baader UHC-S Nebula Filter - 36mm Round Unmounted # FUHC-RD36 2459420
    Baader UHC-S Nebula Filter - 36mm Round Unmounted # FUHC-RD36 2459420
    Sale Price: $78.00 Our Price: $104.00
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  9. On Sale
    Celestron Labs CM2000CF Compound Microscope # 44130
    Celestron Labs CM2000CF Compound Microscope # 44130
    Sale Price: $239.99 Our Price: $279.95
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  10. On Sale
    Meade 8" LX200-ACF f/10 Telescope with UHTC - No Tripod # 0810-60-03N
    Meade 8" LX200-ACF f/10 Telescope with UHTC - No Tripod # 0810-60-03N
    Our Price: $3,799.99
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  11. Closeout
    Long Perng 1.25" 55º Long Eye Relief Eyepiece - 9mm # E9LE
    Long Perng 1.25" 55º Long Eye Relief Eyepiece - 9mm # E9LE
    Sale Price: $85.50 Our Price: $95.00
    Out of Stock
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  12. On Sale
    Sky-Watcher 0.9x Reducer/Corrector for Evolux 82mm Telescope #S20207
    Sky-Watcher 0.9x Reducer/Corrector for Evolux 82mm Telescope #S20207
    Sale Price: $269.00 Our Price: $385.00
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  13. On Sale
    Sky Watcher 8" Collapsible Dobsonian Telescope # S11700
    Sky-Watcher 8" Flextube Dobsonian Telescope # S11700
    Sale Price: $599.00 Our Price: $755.00
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  14. On Sale
    Celestron Labs CB2000CF Compound Microscope # 44131
    Celestron Labs CB2000CF Compound Binocular Microscope # 44131
    Sale Price: $299.99 Our Price: $349.95
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  15. Closeout
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 4mm # E4W-CU01
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 4mm # E4W-CU01
    Sale Price: $220.00 Our Price: $269.00
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  16. Closeout
    Long Perng 1.25" 55º Long Eye Relief Eyepiece - 5mm # E5LE
    Long Perng 1.25" 55º Long Eye Relief Eyepiece - 5mm # E5LE
    Sale Price: $77.90 Our Price: $95.00
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  17. On Sale
    Celestron Nature DX ED 10x42 Binoculars # 72333
    Celestron Nature DX ED 10x42 Binoculars # 72333
    Sale Price: $179.99 Our Price: $219.95
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  18. On Sale
    Sky Watcher 8" Flextube SynScan 200P GoTo Collapsible Dobsonian Telescope # S11800
    Sky-Watcher 8" Flextube SynScan 200P GoTo Collapsible Dobsonian Telescope # S11800
    Sale Price: $1,199.00 Our Price: $1,450.00
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  19. On Sale
    Celestron Outland X 10x25 Binoculars # 71341
    Celestron Outland X 10x25 Binoculars # 71341
    Sale Price: $59.99 Our Price: $69.95
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  20. Clearance
    Clearance: *2nd* Tele Vue 1.25" 2.5x Powermate # PMT-2513 CLN-1097
    Clearance: *2nd* Tele Vue 1.25" 2.5x Powermate # PMT-2513 CLN-1097
    Sale Price: $216.99 Our Price: $229.00
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  21. Closeout
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 9mm # E9W-CU01
    Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 9mm # E9W-CU01
    Sale Price: $220.00 Our Price: $269.00
    In Stock
    Free US Shipping
  22. Closeout
    Long Perng 1.25" 55º Long Eye Relief Eyepiece -18mm # E18LE
    Long Perng 1.25" 55º Long Eye Relief Eyepiece -18mm # E18LE
    Sale Price: $76.00 Our Price: $95.00
    In Stock
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  23. On Sale
    Clearance: *2nd* ZWO ASI183MM Pro Cooled Monochrome Astronomy Camera # ASI183MM-P CLN-1575
    Clearance: *2nd* ZWO ASI183MM Pro Cooled Monochrome Astronomy Camera # ASI183MM-P CLN-1575
    Sale Price: $899.99 Our Price: $999.00
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  24. On Sale
    Sky-Watcher EQ8-Rh Observatory-Class Computerized GoTo Telescope Mount with Pier Tripod # S30701
    Sky-Watcher EQ8-Rh Observatory-Class Computerized GoTo Telescope Mount with Pier Tripod # S3...
    Sale Price: $8,799.00 Our Price: $10,500.00
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Product Banner Type
  1. clearance 145 items
  2. closeout 36 items
  3. discontinued 6 items
  4. new 60 items
  5. sale 30 items
  6. special 10 items
Adapter Specifications
  1. T / T2 Filter Thread - Female 1 item
  2. SCT Thread - Male 4 items
  3. SCT Thread - Female 3 items
  4. Miscellaneous Thread - Male 1 item
Accessory Size
  1. 1.25 inch 14 items
  2. 2 inch 8 items
  3. 36mm Round Unmounted 3 items
Color
Eyepiece Field of View
  1. 51 - 60 degrees 8 items
  2. 71 - 80 degrees 4 items
Telescope Mount Type
  1. No Mount (OTA Only) 27 items
  2. Alt-Azimuth (AZ) 2 items
  3. Equatorial (EQ) 4 items
  4. Fork (Dual Arm) 7 items
  5. Fork (Single Arm) 3 items
  6. Dobsonian 10 items
Binocular Prism Type
  1. Porro Prism 1 item
  2. Roof Prism 8 items
Manufacturer
  1. Agena Astro 2 items
  2. Antlia Filters 3 items
  3. Askar 6 items
  4. Baader Planetarium 26 items
  5. Berlebach 1 item
  6. Blue Fireball 3 items
  7. Celestron 67 items
  8. Coronado 1 item
  9. DayStar Filters 1 item
  10. Explore Scientific 7 items
  11. Founder Optics 2 items
  12. GSO 5 items
  13. iOptron 4 items
  14. Levenhuk 2 items
  15. Long Perng 13 items
  16. Lumicon 13 items
  17. Meade 18 items
  18. Optolong 5 items
  19. Pegasus Astro 1 item
  20. Pentax 1 item
  21. PrimaLuceLab 10 items
  22. QHYCCD 57 items
  23. Sharpstar 1 item
  24. Sky Watcher 22 items
  25. Spectrum Telescope 4 items
  26. Tele Vue 7 items
  27. Thousand Oaks Optical 1 item
  28. Vixen Optics 1 item
  29. William Optics 20 items
  30. ZWO Astronomy Cameras 35 items
Binocular Series
  1. Celestron Nature DX 3 items
  2. Celestron Nature DX ED 2 items
  3. Celestron Outland X 1 item
  4. Celestron SkyMaster 1 item
  5. Celestron TrailSeeker 2 items
  6. Celestron UpClose 1 item
Telescope Series
  1. Askar PHQ 1 item
  2. Askar V 1 item
  3. Celestron Advanced VX 1 item
  4. Celestron AstroMaster 1 item
  5. Celestron CPC 4 items
  6. Celestron NexStar Evolution 2 items
  7. Celestron NexStar SE 1 item
  8. Celestron PowerSeeker 1 item
  9. Celestron RASA 1 item
  10. Celestron Spotting Scopes 3 items
  11. Celestron StarSense Explorer 6 items
  12. Founder Optics Draco Refractor 1 item
  13. GSO Ritchey-Chrétien 1 item
  14. Meade LX85 6 items
  15. Meade LX90 1 item
  16. Meade LX200-ACF 2 items
  17. Sharpstar Refractors 1 item
  18. Sky Watcher Flextube Dobsonian 2 items
  19. Sky Watcher Esprit APO 3 items
  20. Sky Watcher EvoStar 3 items
  21. Sky Watcher Flextube SynScan Dobsonian 1 item
  22. Sky Watcher ProEd 1 item
  23. Sky Watcher Traditional Dobsonian 2 items
  24. William Optics GT 2 items
  25. William Optics RedCat 5 items
  26. William Optics Zenith Star 2 items
  27. ZWO Refractors 4 items
Telescope Aperture
  1. Up to 2" [51mm] 3 items
  2. 2.1 - 3" [76mm] 6 items
  3. 2.1 - 3" [76mm] 3 items
  4. 3.1 - 4" [102mm] 9 items
  5. 4.1 - 5" [127mm] 8 items
  6. 5.1 - 6" [153mm] 8 items
  7. 6.1 - 8" [203mm] 12 items
  8. 8.1 - 10" [254mm] 4 items
  9. 10.1 - 12" [305mm] 4 items
Telescope Optical Design
  1. Advanced Coma Free (ACF) 7 items
  2. Aplanatic Schmidt (EdgeHD) 3 items
  3. Astrograph 6 items
  4. Schmidt-Cassegrain 5 items
  5. Newtonian Reflector 12 items
  6. Ritchey-Chretien 1 item
  7. Doublet (Achromat) 2 items
  8. Doublet (Apochromat) 5 items
  9. Triplet (Apochromat) 6 items
  10. Petzval 6 items
Telescope Focal Length
  1. Up to 300mm 3 items
  2. 301 - 400mm 6 items
  3. 401 - 500mm 5 items
  4. 501 - 600mm 3 items
  5. 601 - 700mm 2 items
  6. 701 - 800mm 3 items
  7. 801 - 900mm 5 items
  8. 901 - 1000mm 2 items
  9. 1001 - 1250mm 7 items
  10. 1251 - 1500mm 3 items
  11. 1501 - 1750mm 2 items
  12. 1751 - 2000mm 1 item
  13. 2001 - 2500mm 9 items
  14. 2501 - 3000m 2 items
Telescope Focal Ratio
  1. Up to f/4 3 items
  2. f/4.1 - f/5 13 items
  3. f/5.1 - f/6 7 items
  4. f/6.1 - f/7 6 items
  5. f/7.1 - f/8 8 items
  6. f/8.1 - f/9 1 item
  7. f/9.1 - f/10 15 items
  8. f/12.1 - f/13 1 item
Eyepiece Focal Length
  1. 5mm and Under 4 items
  2. 5.1mm - 10mm 2 items
  3. 10.1mm - 15mm 5 items
  4. 15.1mm - 20mm 1 item
Experience Level
  1. Beginner 8 items
  2. Intermediate 26 items
  3. Advanced 11 items
Stock
  1. In Stock 271 items
  2. Out of Stock 69 items
Price
  1. $0.00 - $1,000.00 252 items
  2. $1,000.00 - $2,000.00 40 items
  3. $2,000.00 - $3,000.00 18 items
  4. $3,000.00 - $4,000.00 15 items
  5. $4,000.00 - $5,000.00 11 items
  6. $5,000.00 - $6,000.00 1 item
  7. $6,000.00 - $7,000.00 1 item
  8. $7,000.00 - $8,000.00 1 item
  9. $8,000.00 - $9,000.00 1 item
$ - $