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  1. Orion 1.25" H-Alpha Extra-Narrowband Filter

    Orion - 1.25" H-Alpha Extra-Narrowband Filter

    Get Great Nebula Images Under City Lights or a Full Moon with the Orion Hydrogen-Alpha Extra Narrowband Astrophotography Filter!

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    Model#: 05587
    Orion Winter Accessory Extravaganza (ends Feb 16, 2016)!

    Regular Price: $189.99

    Special Price: $161.49

  2. Orion 1.25" Dark Frame Imaging Filter

    Orion - 1.25" Dark Frame Imaging Filter

    The Orion 1.25" Dark Frame Imaging Filter eliminates camera noise and hot pixels by blocking light from the imaging sensor to obtain dark frames.

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    Model#: 05451
    $29.99

  3. Orion 1.25" 25% Transmission Moon Filter

    Orion - 1.25" 25% Transmission Moon Filter

    Useful telescope eyepiece filter transmits 25% of incoming light. Ideal for viewing crescent Moon phases and for lunar viewing in smaller-aperture telescopes, for which less dimming is required.

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    Model#: 05598
    $20.99

  4. Optolong Venus U Filter - 2" Mounted

    Optolong - Venus U Filter - 2" Mounted

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    FREE SHIPPING
    (48 States)
    Model#: VEU-200
    $253.30

  5. Optolong Venus U Filter - 1.25" Mounted

    Optolong - Venus U Filter - 1.25" Mounted

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    Model#: VEU-125
    $191.80

  6. Optolong Variable Polarizer Filter - 2" Mounted
  7. Optolong Variable Polarizer Filter - 1.25" Mounted
  8. Optolong - UV-IR Cut Filter - 36mm Unmounted
  9. Optolong - UV-IR Cut Filter - 31mm Unmounted
  10. Optolong UV-IR Cut Filter 2" Mounted

    Optolong - UV-IR Cut Filter - 2" Mounted

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    Model#: UVIR-200
    $65.00

  11. Optolong UV-IR Cut Filter - 1.25" Mounted
  12. Optolong UHC Filter - 77mm Round Mounted
  13. Optolong UHC Filter - 2" Mounted

    Optolong - UHC Filter - 2" Mounted

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    Model#: UHC-200
    $85.00

  14. Optolong UHC Filter - 1.25" Mounted

    Optolong - UHC Filter - 1.25" Mounted

    This UHC, or Ultra High Contrast, filter from Optolong provides a bit more contrast than the CLS filter, but works in much the same way.

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    Model#: UHC-125
    $55.00

  15. Optolong - UBVRI Filter Set - 50mm Unmounted

    Optolong - UBVRI Filter Set - 50mm Unmounted

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    FREE SHIPPING
    (48 States)
    Model#: UBVRI-50U
    $855.00

  16. Optolong - UBVRI Filter Set - 50mm Square Unmounted

    Optolong - UBVRI Filter Set - 50mm Square Unmounted

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    (48 States)
    Model#: UBVRI-50SQ
    $901.00

  17. Optolong - UBVRI Filter Set - 36mm Unmounted

    Optolong - UBVRI Filter Set - 36mm Unmounted

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    (48 States)
    Model#: UBVRI-36U
    $745.00

  18. Optolong - UBVRI Filter Set - 31mm Unmounted

    Optolong - UBVRI Filter Set - 31mm Unmounted

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    (48 States)
    Model#: UBVRI-31U
    $740.00

  19. Optolong - UBVRI Filter Set - 2" Mounted

    Optolong - UBVRI Filter Set - 2" Mounted

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    (48 States)
    Model#: UBVRI-200
    $830.00

  20. Optolong - UBVRI Filter Set - 1.25" Mounted

    Optolong - UBVRI Filter Set - 1.25" Mounted

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    FREE SHIPPING
    (48 States)
    Model#: UBVRI-125
    $685.00

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