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  • Astronomik 31 mm CLS Light Pollution Filter
    Astronomik Filters Astronomik CLS Light Pollution Filter - 31 mm Round - CLS-31
    $95.95
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  • Optolong Optolong OIII CCD 6.5nm Filter - 31mm Unmounted - OIIICCD65-31U
    $189.00
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  • Optolong SII Unmounted Filter
    Optolong Optolong SII CCD 12nm Filter - 31mm Unmounted - SIICCD12-31U
    $153.00 $125.00
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  • Optolong SII Unmounted Filter
    Optolong Optolong SII CCD 6.5nm Filter - 31mm Unmounted - SIICCD65-31U
    $193.00
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  • Optolong H-Alpha Unmounted Filter
    Optolong Optolong H-Alpha 7nm CCD Filter - 31mm Unmounted - HAL7-31U
    $190.00
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  • Optolong Optolong LRGB CCD Filter Set - 31mm Unmounted - LRGB-31U
    $291.00
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  • Optolong Optolong UBVRI Filter Set - 31mm Unmounted - UBVRI-31U
    $740.00 $481.00
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  • Optolong UVIR Cut Unmounted Filter
    Optolong Optolong UV-IR Cut Filter - 31mm Unmounted - UVIR-31U
    $55.00
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  • ZWO Astronomy Cameras ZWO LRGB Filter Set - 31mm Unmounted - LRGB-31
    $169.00
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  • ZWO Astronomy Cameras ZWO H-Alpha 7nm CCD Filter - 31mm - HA31
    $149.00
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  • ZWO Astronomy Cameras ZWO SII 7nm Filter - 31mm - SII31
    $149.00
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  • ZWO Astronomy Cameras ZWO OIII 7nm Filter - 31mm - OIII31
    $149.00
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  • ZWO Astronomy Cameras ZWO 31mm Narrowband Filter Set - OIII, Ha, SII - NBSET-31
    $425.00
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  • Astronomik 31 mm Round Mounted MC Clear Glass Filter
    Astronomik Filters Astronomik MC Clear Glass Filter - 31 mm Round - C-31
    $49.95
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  • Astronomik Filters Astronomik CLS-CCD Light Pollution Filter - 31 mm Round - CLSCCD-31
    $109.95
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  • Astronomik 31 mm Round H-Alpha 12 nm CCD Filter
    Astronomik Filters Astronomik H-Alpha 12 nm CCD Filter - 31 mm Round - HA12-31
    $169.95
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  • Astronomik 6 nm H-Alpha Filter in 31 mm Format
    Astronomik Filters Astronomik H-Alpha 6 nm CCD Filter - 31 mm Round - HA6-31
    $249.95
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  • Astronomik 31 mm Round LRGB Filter Set
    Astronomik Filters Astronomik LRGB Filter Set - 31 mm Round - LRGB-31
    $319.95
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  • Astronomik OIII 12 nm CCD Filter - 31 mm Round
    Astronomik Filters Astronomik OIII 12 nm CCD Filter - 31 mm Round - OIIICCD-31
    $169.95
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  • Astronomik 31 mm Round SII 12 nm CCD Filter
    Astronomik Filters Astronomik SII 12 nm CCD Filter - 31 mm - SII-31
    $169.95
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  • Astronomik OIII 6 nm CCD Filter - 31 mm Round
    Astronomik Filters Astronomik OIII 6 nm CCD Filter - 31 mm Round - OIIICCD6-31
    $249.95
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  • Astronomik 31 mm Round SII 6 nm CCD Filter
    Astronomik Filters Astronomik SII 6 nm CCD Filter - 31 mm - SII6-31
    $249.95
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  • Astronomik 31 mm Round Deep Sky RGB Color Filter Set
    Astronomik Filters Astronomik Deep Sky RGB Color Filter Set - 31 mm Round - DRGB-31
    $319.95
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  • Astronomik 31 mm L-1 UV-IR Blocking Filter
    Astronomik Filters Astronomik L-1 UV-IR Blocking Filter - 31 mm Round - L1-31
    $79.95
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  • Astronomik L-2 UV-IR Blocker - 31 mm Round
    Astronomik Filters Astronomik L-2 UV-IR Blocking Filter - 31 mm Round - L2-31
    $69.95
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  • Astronomik 31 mm L-3 Luminance UV-IR Blocking Filter
    Astronomik Filters Astronomik L-3 UV-IR Blocking Filter - 31 mm Round - L3-31
    $79.95
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  • Astronomik 31 mm Round ProPlanet 642 IR-Pass Filter
    Astronomik Filters Astronomik ProPlanet 642 IR Pass Filter - 31 mm Round - P642-31
    $79.95
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  • Astronomik ProPlanet 742 IR-Pass 31 mm Round Filter
    Astronomik Filters Astronomik ProPlanet 742 IR Pass Filter - 31 mm Round - P742-31
    $59.95
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  • Astronomik ProPlanet 807 IR-Pass Filter - 31 mm Round
    Astronomik Filters Astronomik ProPlanet 807 IR Pass Filter - 31 mm Round - P807-31
    $55.95
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  • Baader Planetarium 31 mm Round Unmounted UV-IR Cut Luminance Filter
    Baader Planetarium Baader 31 mm UV-IR Cut L-Filter - FUVIR-RD31
    $60.00
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  • Astrodon Generation 2 I-Series Tru-Balance LRGB Filter Set - 31 mm Unthreaded Insert
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 31 mm Unthreaded Insert - LRGB2-I31R
    $615.00
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  • Astronomik 31 mm Round UHC-E Filter
    Astronomik Filters Astronomik UHC-E Filter - 31 mm Round - UHCE-31
    $75.95
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  • Astronomik 31 mm Round Color Filter - Red
    Astronomik Filters Astronomik Red Type 2c Filter - 31 mm Round - R-31
    $89.95
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  • Astronomik 31 mm Round Color Filter - Green
    Astronomik Filters Astronomik Green Type 2c Filter - 31 mm Round - G-31
    $89.95
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  • Astronomik 31 mm Round Color Filter - Blue
    Astronomik Filters Astronomik Blue Type 2c Filter - 31 mm Round - B-31
    $89.95
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  • Astrodon Generation 2 E-Series Tru-Balance LRGB Filter Set - 31 mm Unthreaded Insert
    Astrodon Astrodon Gen2 E-Series LRGB Tru-Balance Filter Set - 31 mm Unthreaded Insert - LRGB2-E31R
    $615.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm H-Alpha Narrowband Filter - 31 mm Unthreaded Insert - HA3-31R
    $574.00
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  • Astrodon 31 mm Unthreaded 3 nm OIII Narrowband Filter
    Astrodon Astrodon 3 nm OIII Narrowband Filter - 31 mm Unthreaded Insert - OIII3-31R
    $574.00
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  • Astrodon 1.25
    Astrodon Astrodon Clear Filter with UV-Blocking Only - 31 mm Unthreaded Insert - C2-31R
    $183.00
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  • Astrodon 31 mm Unthreaded Luminance Filter with UV/NIR Blocking
    Astrodon Astrodon Luminance UV/NIR Blocking Filter - 31 mm Unthreaded Insert - L2-31R
    $194.00
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One of the most crucial accessories of astro-imaging is filters. Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue. Different filters will act differently, highlighting a rainbow of wavelengths to enhance a variety of features in the night sky.


Deep-space imaging in particular benefits from filters. Far away celestial objects, such as nebulae come to life in your photos with vivid colors. We recommend starting out with an h-alpha filter to filter out broadband light pollution while only allowing a very narrow bandwidth of light to pass through. These are a favorite filter among astrophotographers!


We offer deep sky filters and planetary filters from Lumicon, Baader Planetarium, Celestron, TeleVue, Meade, Orion, High Point & Thousand Oaks. Telescope filters will add to the performance of virtually any telescope and are a highly recommended telescope accessory. Feel free to contact one of our telescope experts for advice on selecting the filter assortment that is right for you.

High Point Scientific is rated 4.9/5 based on 1347 reviews

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