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!

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GSO Telescopes & Accessories

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  1. GSO Dovetail Mount for Vixen-Style Telescope Dovetail Bar/Rail (80mm Diameter) - Black # FF561
    GSO Dovetail Mount for Vixen-Style Telescope Dovetail Bar/Rail (80mm Diameter) - Black # FF561
    Our Price: $46.00
    In Stock
    Free US Shipping
  2. GSO Telescope Tube Mounting Rings (Set of 2) - 90mm (3.54")
    GSO Telescope Tube Mounting Rings (Set of 2) - 90mm (3.54")
    Our Price: $40.00
    Out of Stock
    Free US Shipping
  3. GSO 1.25" 90-deg Mirror Star Diagonal for Refractors # GSST
    GSO 1.25" 90-deg Mirror Star Diagonal for Refractors # GSST
    Our Price: $30.00
    Out of Stock
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  4. GSO Parabolic Primary Mirror - 6" f/8
    GSO Parabolic Primary Mirror - 6" f/8
    Our Price: $160.00
    Out of Stock
    Free US Shipping
  5. GSO 6" f/8 Parabolic Primary and 31mm Secondary Telescope Mirror Set
    GSO 6" f/8 Parabolic Primary and 31mm Secondary Telescope Mirror Set
    Our Price: $190.00
    Out of Stock
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  6. GSO 1.25" Color / Planetary Filter - #82A Light Blue
    GSO 1.25" Color / Planetary Filter - #82A Light Blue
    Our Price: $11.95
    In Stock
    Free US Shipping Over $25
  7. GSO Parabolic Primary Mirror - 8" f/6
    GSO Parabolic Primary Mirror - 8" f/6
    Our Price: $325.00
    Out of Stock
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  8. GSO Elliptical Secondary Mirror - 31mm
    GSO Elliptical Secondary Mirror - 31mm
    Our Price: $40.00
    In Stock
    Free US Shipping
  9. GSO 1.25" Color / Planetary Filter - #8 Light Yellow
    GSO 1.25" Color / Planetary Filter - #8 Light Yellow
    Our Price: $11.95
    Out of Stock
    Free US Shipping Over $25
  10. GSO 1.25" Neutral Density / Moon Filter ND96-0.3 50% Transmission
    GSO 1.25" Neutral Density / Moon Filter ND96-0.3 50% Transmission
    Our Price: $11.95
    Out of Stock
    Free US Shipping Over $25
  11. GSO 1.25" Color / Planetary Filter - #21 Orange
    GSO 1.25" Color / Planetary Filter - #21 Orange
    Our Price: $11.95
    Out of Stock
    Free US Shipping Over $25
  12. GSO 1.25" 3x ED Barlow Lens
    GSO 1.25" 3x ED Barlow Lens
    Our Price: $43.00
    Out of Stock
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  13. Replacement Tension and Focus Lock Thumb Screw Set for GSO Crayford Focusers
    Replacement Tension and Focus Lock Thumb Screw Set for GSO Crayford Focusers
    Our Price: $7.50
    Out of Stock
    Free US Shipping Over $25
  14. GSO 2" Linear Bearing Crayford Focuser for Refractors - Dual Speed (with 96.6mm Flange)
    GSO 2" Linear Bearing Crayford Focuser for Refractors - Dual Speed (with 96.6mm Flange)
    Our Price: $205.00
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  15. GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for SCTs
    GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for SCTs
    Our Price: $135.00
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  16. GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for Refractors
    GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for Refractors
    Our Price: $135.00
    Out of Stock
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  17. GSO IR Blocking / IR Cut Filter - 1.25"
    GSO IR Blocking / IR Cut Filter - 1.25"
    Our Price: $23.95
    Out of Stock
    Free US Shipping Over $25
  18. GSO 1.25" Color / Planetary Filter - #47 Violet
    GSO 1.25" Color / Planetary Filter - #47 Violet
    Our Price: $11.95
    Out of Stock
    Free US Shipping Over $25
  19. GSO 1.25" Color / Planetary Filter - #23A Light Red
    GSO 1.25" Color / Planetary Filter - #23A Light Red
    Our Price: $11.95
    Out of Stock
    Free US Shipping Over $25
  20. GSO 2" Linear Bearing Crayford Focuser for SCTs - Dual Speed
    GSO 2" Linear Bearing Crayford Focuser for SCTs - Dual Speed
    Our Price: $190.00
    Out of Stock
    Free US Shipping
  21. GSO Parabolic Primary Mirror - 10" f/5
    GSO Parabolic Primary Mirror - 10" f/5
    Our Price: $470.00
    Out of Stock
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  22. GSO 0.965"/1.25" 90-deg Hybrid Mirror Star Diagonal # MSDH
    GSO 0.965"/1.25" 90-deg Hybrid Mirror Star Diagonal
    Our Price: $32.00
    Out of Stock
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  23. GSO 2" Crayford Focuser for Refractors - Single Speed (with 86.4mm Telescope Adapter)
    GSO 2" Crayford Focuser for Refractors - Single Speed (with 86.4mm Telescope Adapter)
    Our Price: $120.00
    Out of Stock
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  24. GSO 1.25" Plossl Eyepiece - 9mm
    GSO 1.25" Plossl Eyepiece - 9mm
    Our Price: $28.95
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Category
Product Banner Type
  1. clearance 4 items
  2. new 19 items
Adapter Specifications
  1. 1.25" Eyepiece Holder 1 item
  2. 2" Nosepiece 2 items
  3. M48 (2" Filter) Thread - Male 1 item
  4. M48 (2" Filter) Thread - Female 2 items
  5. T / T2 Filter Thread - Male 1 item
  6. SCT Thread - Male 2 items
  7. SCT Thread - Female 1 item
  8. Miscellaneous Thread - Male 4 items
  9. Miscellaneous Thread - Female 5 items
Dovetail Design/Series
  1. V Series (Vixen) 4 items
Accessory Size
  1. 1.25 inch 31 items
  2. 2 inch 17 items
  3. Hybrid 4 items
Screw Type
  1. Thumb screw 3 items
Screw Heads
  1. Knurled 3 items
Eyepiece Field of View
  1. Up to 50 degrees 2 items
  2. 51 - 60 degrees 11 items
  3. 61 - 70 degrees 8 items
Focuser Scope Type
  1. Reflector 7 items
  2. Refractor 10 items
  3. SCT 4 items
Telescope Mount Type
  1. No Mount (OTA Only) 28 items
Manufacturer
  1. Agena Astro 4 items
  2. Blue Fireball 1 item
  3. GSO 211 items
  4. Starlight Instruments 3 items
Telescope Series
  1. GSO Cassegrain 5 items
  2. GSO Standard Newtonian 6 items
  3. GSO Imaging Newtonian 7 items
  4. GSO Ritchey-Chrétien 10 items
Telescope Aperture
  1. 5.1 - 6" [153mm] 9 items
  2. 6.1 - 8" [203mm] 9 items
  3. 8.1 - 10" [254mm] 5 items
  4. 10.1 - 12" [305mm] 3 items
  5. 12.1 - 16" [407mm] 2 items
Telescope Optical Design
  1. Cassegrain Reflector 5 items
  2. Newtonian Reflector 13 items
  3. Ritchey-Chretien 10 items
Telescope Focal Length
  1. 501 - 600mm 2 items
  2. 701 - 800mm 5 items
  3. 801 - 900mm 2 items
  4. 901 - 1000mm 3 items
  5. 1001 - 1250mm 1 item
  6. 1251 - 1500mm 1 item
  7. 1501 - 1750mm 2 items
  8. 1751 - 2000mm 5 items
  9. 2001 - 2500mm 4 items
  10. 2501 - 3000m 2 items
  11. Greater than 3000mm 1 item
Telescope Focal Ratio
  1. Up to f/4 7 items
  2. f/4.1 - f/5 4 items
  3. f/5.1 - f/6 2 items
  4. f/7.1 - f/8 9 items
  5. f/8.1 - f/9 1 item
  6. f/11.1 - f/12 5 items
Eyepiece Focal Length
  1. 5mm and Under 1 item
  2. 5.1mm - 10mm 2 items
  3. 10.1mm - 15mm 4 items
  4. 15.1mm - 20mm 3 items
  5. 20.1mm - 30mm 4 items
  6. 30.1mm - 40mm 4 items
  7. 40.1mm and Higher 4 items
Experience Level
  1. Beginner 10 items
  2. Intermediate 12 items
  3. Advanced 6 items
Dovetail Length
  1. 6.1" - 8" 2 items
Stock
  1. In Stock 80 items
  2. Out of Stock 131 items
Price
  1. $0.00 - $1,000.00 195 items
  2. $1,000.00 - $2,000.00 7 items
  3. $2,000.00 - $3,000.00 2 items
  4. $3,000.00 - $4,000.00 3 items
  5. $4,000.00 - $5,000.00 2 items
  6. $6,000.00 - $7,000.00 1 item
  7. $7,000.00 - $8,000.00 1 item
$ - $