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  1. 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#: ORI-05451

    Available - Ships in 2-4 Days

    $19.99

  2. 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#: ORI-05598

    Available - Ships in 2-4 Days

    $20.99

  3. Optolong Venus U Filter - 2" Mounted

    Optolong - Venus U Filter - 2" Mounted

    Picture the sulphuric acid clouds of Venus or do UV landscape photography with the Optolong 2" Venus U Filter. This special filter must be utilized for imaging through CCD/CMOS or DSLR cameras* only since our eyes are not sensitive to UV wavelengths.

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    (48 States)
    Model#: VEU-200

    Available - Ships in 2-4 Days

    $253.30

  4. Optolong Venus U Filter - 1.25" Mounted

    Optolong - Venus U Filter - 1.25" Mounted

    Picture the sulphuric acid clouds of Venus or do UV landscape photography with the Optolong 1.25" Venus U Filter. This special filter must be utilized for imaging through CCD/CMOS or DSLR cameras* only since our eyes are not sensitive to UV wavelengths.

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    Model#: VEU-125

    Available - Ships in 2-4 Days

    $191.80

  5. Optolong Variable Polarizer Filter - 2" Mounted

    Optolong - Variable Polarizer Filter - 2" Mounted

    Adjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is like a pair of shades. They work fine, however in some cases the scene is excessively dull or too bright, and very little can be done about it.

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    Model#: VPO-200

    Available - Ships in 2-4 Days

    $48.00

  6. Optolong Variable Polarizer Filter - 1.25" Mounted

    Optolong - Variable Polarizer Filter - 1.25" Mounted

    Adjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is like a pair of shades. They work fine, however in some cases the scene is excessively dull or too bright, and very little can be done about it.

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    Model#: VPO-125

    Available - Ships in 2-4 Days

    $39.40

  7. Optolong - UV-IR Cut Filter - 36mm Unmounted

    Optolong - UV-IR Cut Filter - 36mm Unmounted

    Improve image sharpness with the addition of an Optolong UV-IR Cut Filter, which blocks Ultraviolet and Infrared transmissions yet lets the visible spectral lines shine through. The IR (700nm to 1100nm) and UV (300nm - 400nm) part of the spectrum are not detectable to human eyes, however not to most CCD and other computerized cameras, which are sensitive to 300nm to 1100nm.

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    Model#: UVIR-36U

    Available - Ships in 2-4 Days

    $56.00

  8. Optolong UV-IR Cut Filter - 31mm Unmounted

    Optolong - UV-IR Cut Filter - 31mm Unmounted

    Improve image sharpness with the addition of an Optolong UV-IR Cut Filter, which blocks Ultraviolet and Infrared transmissions yet lets the visible spectral lines shine through. The IR (700nm to 1100nm) and UV (300nm - 400nm) part of the spectrum are not detectable to human eyes, however not to most CCD and other computerized cameras, which are sensitive to 300nm to 1100nm.

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    Model#: UVIR-31U

    Available - Ships in 2-4 Days

    $55.00

  9. Optolong UV-IR Cut Filter 2" Mounted

    Optolong - UV-IR Cut Filter - 2" Mounted

    Improve image sharpness with the addition of an Optolong UV-IR Cut Filter, which blocks Ultraviolet and Infrared transmissions yet lets the visible spectral lines shine through. The IR (700nm to 1100nm) and UV (300nm - 400nm) part of the spectrum are not detectable to human eyes, however not to most CCD and other computerized cameras, which are sensitive to 300nm to 1100nm.

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    Model#: UVIR-200

    Available - Ships in 2-4 Days

    $65.00

  10. Optolong UV-IR Cut Filter - 1.25" Mounted

    Optolong - UV-IR Cut Filter - 1.25" Mounted

    Improve image sharpness with the addition of an Optolong UV-IR Cut Filter, which blocks Ultraviolet and Infrared transmissions yet lets the visible spectral lines shine through. The IR (700nm to 1100nm) and UV (300nm - 400nm) part of the spectrum are not detectable to human eyes, however not to most CCD and other computerized cameras, which are sensitive to 300nm to 1100nm.

    ...
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    Model#: UVIR-125

    Available - Ships in 2-4 Days

    $44.00

  11. Optolong UHC Filter - 77mm Round Mounted

    Optolong - UHC Filter - 77mm Round Mounted

    This UHC, or Ultra High Contrast, filter from Optolong gives more contrast than the CLS filter, but works similarly. By decreasing the contrast-killing effects of light pollution brought on by both artificial and natural sources, the background sky becomes darker, increasing the visibility of your favorite deep-sky objects.

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    Model#: UHC-77

    Available - Ships in 2-4 Days

    $188.00

  12. Optolong UHC Filter - 2" Mounted

    Optolong - UHC Filter - 2" Mounted

    This UHC, or Ultra High Contrast, filter from Optolong gives more contrast than the CLS filter, but works similarly. By decreasing the contrast-killing effects of light pollution brought on by both artificial and natural sources, the background sky becomes darker, increasing the visibility of your favorite deep-sky objects.

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    Model#: UHC-200

    Available - Ships in 2-4 Days

    $85.00

  13. Optolong UHC Filter - 1.25" Mounted

    Optolong - UHC Filter - 1.25" Mounted

    This UHC, or Ultra High Contrast, filter from Optolong gives more contrast than the CLS filter, but works similarly. By decreasing the contrast-killing effects of light pollution brought on by both artificial and natural sources, the background sky becomes darker, increasing the visibility of your favorite deep-sky objects.

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    Model#: UHC-125

    Available - Ships in 2-4 Days

    $55.00

  14. Optolong - SII CCD 6.5nm Filter - 50mm Square Unmounted

    Optolong - SII CCD 6.5nm Filter - 50mm Square Unmounted

    The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and radically decreases other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural).

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    (48 States)
    Model#: SIICCD65-50SQ

    Available - Ships in 2-4 Days

    $299.00

  15. Optolong SII CCD 6.5nm Filter - 31mm Unmounted

    Optolong - SII CCD 6.5nm Filter - 31mm Unmounted

    The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and radically decreases other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural).

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    Model#: SIICCD65-31U

    Available - Ships in 2-4 Days

    $193.00

  16. Optolong SII CCD 6.5nm Filter - 2" Mounted

    Optolong - SII CCD 6.5nm Filter - 2" Mounted

    The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and radically decreases other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural).

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    (48 States)
    Model#: SIICCD65-200

    Available - Ships in 2-4 Days

    $250.00

  17. Optolong SII CCD 6.5nm Filter - 1.25" Mounted

    Optolong - SII CCD 6.5nm Filter - 1.25" Mounted

    The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and radically decreases other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural).

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    Model#: SIICCD65-125

    Available - Ships in 2-4 Days

    $159.00

  18. Optolong - SII CCD 12nm Filter - 50mm Unmounted

    Optolong - SII CCD 12nm Filter - 50mm Unmounted

    The Optolong Sulfur II 12nm Narrowband Filter works by allowing a 12nm bandwidth of light, centered on the 672nm wavelength through, and blocking contrast-killing light pollution wavelengths from coming through.

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    (48 States)
    Model#: SIICCD12-50U

    Available - Ships in 2-4 Days

    $209.00

  19. Optolong SII CCD 12nm Filter - 36mm Unmounted

    Optolong - SII CCD 12nm Filter - 36mm Unmounted

    The Optolong Sulfur II 12nm Narrowband Filter works by allowing a 12nm bandwidth of light, centered on the 672nm wavelength through, and blocking contrast-killing light pollution wavelengths from coming through.

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    Model#: SIICCD12-36U

    Available - Ships in 2-4 Days

    $159.00

  20. Optolong SII CCD 12nm Filter - 31mm Unmounted

    Optolong - SII CCD 12nm Filter - 31mm Unmounted

    The Optolong Sulfur II 12nm Narrowband Filter works by allowing a 12nm bandwidth of light, centered on the 672nm wavelength through, and blocking contrast-killing light pollution wavelengths from coming through.

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    Model#: SIICCD12-31U

    Available - Ships in 2-4 Days

    $153.00

Items 41 to 60 of 489 total

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