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31mm Filters

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  1. Astronomik - CLS Light Pollution Filter - 31mm Round Unmounted

    Astronomik - CLS Light Pollution Filter - 31mm Round Unmounted

    The Astronomik CLS is an excellent filter for black & white and color imaging of nebulae, galaxies and star clusters with astronomical instruments of any size.

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    Model#: CLS-31
    $79.95

  2. Astronomik - ProPlanet 642 BP IR-Pass Filter - 31mm

    Astronomik - ProPlanet 642 BP IR-Pass Filter - 31mm

    and enhance contrast when used for lunar- and planetary imaging, and third it will be a very ... Learn More
    Model#: P642-31
    $69.95

  3. Astronomik - Planet IR Pro 742 Filter - 31mm Round Unmounted

    Astronomik - Planet IR Pro 742 Filter - 31mm Round Unmounted

    advantage is that the sky background of advanced dawn is dark and so the filter even allows photography of the planets and the moon at daylight. ... Learn More
    Model#: P742-31
    $55.95

  4. 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
    $55.00

  5. Astronomik - Luminance Filter - 31mm Round Unmounted

    Astronomik - Luminance Filter - 31mm Round Unmounted

    The Astronomik UV and IR cut Filter is great for for digital photography!

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    Model#: L-31
    $55.95

  6. Astronomik - Planet IR Pro 807 Filter - 31mm Round Unmounted

    Astronomik - Planet IR Pro 807 Filter - 31mm Round Unmounted

    The Astronomik ProPlanet 807 filter is a deal addition to the Astronomik ProPlanet 742 for imaging the moon and planets, with telescopes larger then 10" (250mm) when the seeing is poor.

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    Model#: P807-31
    $55.95

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