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  1. 1.25" Extension Tube for William Optics Binoviewer

    1.25" Extension Tube for William Optics Binoviewer

    Our Price: $20.00
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  2. 2x Barlow Nosepiece for William Optics Binoviewer

    2x Barlow Nosepiece for William Optics Binoviewer

    Our Price: $30.00
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  3. Agena 2" Color / Planetary Filter - #11 Yellow / Green

    Agena 2" Color / Planetary Filter - #11 Yellow / Green

    Our Price: $20.95

    Out of stock

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  4. Agena 2" Color / Planetary Filter - #12 Yellow

    Agena 2" Color / Planetary Filter - #12 Yellow

    Our Price: $20.95
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  5. Agena 2" Color / Planetary Filter - #21 Orange

    Agena 2" Color / Planetary Filter - #21 Orange

    Our Price: $20.95
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  6. Agena 2" Color / Planetary Filter - #23A Light Red

    Agena 2" Color / Planetary Filter - #23A Light Red

    Our Price: $20.95
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  7. Agena 2" Color / Planetary Filter - #25 Red

    Agena 2" Color / Planetary Filter - #25 Red

    Our Price: $20.95
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  8. Agena 2" Color / Planetary Filter - #38A Dark Blue

    Agena 2" Color / Planetary Filter - #38A Dark Blue

    Our Price: $20.95
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  9. Agena 2" Color / Planetary Filter - #47 Violet

    Agena 2" Color / Planetary Filter - #47 Violet

    Our Price: $20.95
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  10. Agena 2" Color / Planetary Filter - #56 Green

    Agena 2" Color / Planetary Filter - #56 Green

    Our Price: $20.95
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Items 1 to 10 of 441 total

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Narrow Your Search
Category
  1. Barlows & Extenders (39)
  2. Binoviewers (4)
  3. Correctors, Focal Reducers & Flatteners (32)
  4. Diagonals & Prisms (50)
  5. Filters (234)
  6. Finder Scopes (81)
  7. All Optical Accessories (408)
Accessory Size
  1. 1.25 inch (160)
  2. 2 inch (128)
  3. T / T2 Threaded (1)
  4. Hybrid (10)
  5. SCT (10)
Adapter Specifications
  1. 2" Nosepiece (6)
  2. M48 (2" Filter) Thread - Male (3)
  3. M48 (2" Filter) Thread - Female (5)
  4. T / T2 Filter Thread - Male (3)
  5. T / T2 Filter Thread - Female (5)
  6. SCT Thread - Male (2)
  7. SCT Thread - Female (6)
Eyepiece Series
  1. Baader Classic Ortho/Plossl (1)
Manufacturer
  1. Agena AstroProducts (43)
  2. Antares (39)
  3. Baader Planetarium (86)
  4. Bob's Knobs (1)
  5. BST (2)
  6. Celestron (20)
  7. Coronado (1)
  8. Farpoint Astronomical (1)
  9. Explore Scientific (6)
  10. GSO (53)
  11. HoTech (1)
  12. Howie Glatter (4)
  13. Lumicon (70)
  14. Meade (33)
  15. Parks Optical (1)
  16. Rigel Systems (5)
  17. TeleVue (28)
  18. Telrad (12)
  19. Thousand Oaks Optical (9)
  20. William Optics (18)
  21. All Other (2)
Price
  1. $0.00 - $99.99 (309)
  2. $100.00 - $199.99 (76)
  3. $200.00 - $299.99 (39)
  4. $300.00 - $399.99 (7)
  5. $400.00 - $499.99 (5)
  6. $500.00 - $599.99 (2)
  7. $600.00 - $699.99 (2)
  8. $700.00 and above (1)
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