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  • Baader 50 mm Square LRGBC Filter Set
    Baader Planetarium Baader LRGBC CCD Filter Set - 50 mm Square Unmounted - FLRGBC-SQ50
    $849.00
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  • Baader 50 mm Square LRGB Filter Set
    Baader Planetarium Baader LRGB CCD Filter Set - 50 mm Square Unmounted - FLRGB-SQ50
    $789.00
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  • Baader SII 8nm Narrowband Filter - 50 mm Square
    Baader Planetarium Baader S-II 8 nm Narrowband CCD Filter - 50 mm Square Unmounted - FSIIN-SQ50
    $360.00
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  • Baader OIII 8.5 nm Filter - 50 mm Square Unmounted
    Baader Planetarium Baader OIII 8.5 nm Narrowband CCD Filter - 50 mm Square Unmounted - FOIIIN-SQ50
    $374.00
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  • Baader 50 mm Square Unmounted H-alpha 7 nm Narrowband Filter
    Baader Planetarium Baader H-Alpha 7 nm Narrowband CCD Filter - 50 mm Square Unmounted - FHALN-SQ50
    $419.00
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  • Baader 50 mm Square Unmounted UV-IR Cut/L Filter
    Baader Planetarium Baader UV-IR-Cut L Filter - 65 mm Square Unmounted - FUVIR-SQ65
    $267.00
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  • Baader 50 mm Square Unmounted 35 nm H-Alpha CCD Filter
    Baader Planetarium Baader 35 nm Midband H-Alpha CCD Filter - 50 mm Square Unmounted - FHAL-SQ50
    $264.00
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  • Baader 50 mm Square 3.5 nm H-Alpha Enforced Narrowband Filter
    Baader Planetarium Baader 3.5 nm H-Alpha Enforced Narrowband CCD Filter - 50 mm Square Unmounted - FHALNE-SQ50
    $640.00
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  • Baader 8.5 nm H-Beta Filter - 50 mm Square
    Baader Planetarium Baader 8.5 nm H-Beta Narrowband CCD Filter - 50 mm Square Unmounted - FHBN-SQ50
    $399.00
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  • Astronomik 50 mm Round LRGB Filter Set
    Astronomik Filters Astronomik LRGB Filter Set - 50 mm Round - LRGB-50R
    $569.95
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  • Astronomik OIII 12 nm CCD Filter - 50 mm Round
    Astronomik Filters Astronomik OIII 12 nm CCD Filter - 50 mm Round - OIIICCD-50R
    $299.95
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  • Astronomik 50 mm Round 6 nm OIII CCD Filter
    Astronomik Filters Astronomik OIII 6 nm CCD Filter - 50 mm Round - OIIICCD6-50R
    $469.95
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  • Astronomik 50 mm Round SII 12 nm CCD Filter
    Astronomik Filters Astronomik SII 12 nm CCD Filter - 50 mm Round - SII-50R
    $299.95
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  • Astronomik 50 mm Round SII 6 nm CCD Filter
    Astronomik Filters Astronomik SII 6 nm CCD Filter - 50 mm Round - SII6-50R
    $469.95
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  • Astronomik 50 mm Deep Sky RGB Color Filters - Round
    Astronomik Filters Astronomik Deep Sky RGB Color Filter Set - 50 mm Round - DRGB-50R
    $579.95
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  • Astronomik 50 mm Round H-Alpha 6 nm CCD Filter
    Astronomik Filters Astronomik H-Alpha 6 nm CCD Filter - 50 mm Round - HA6-50R
    $469.95
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  • Astronomik L-1 UV-IR Blocking Luminance Filter - 50 mm Round
    Astronomik Filters Astronomik L-1 UV-IR Blocking Filter - 50 mm Round - L1-50R
    $129.95
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  • Astronomik L-2 UV-IR Blocker - 50 mm Round Filter
    Astronomik Filters Astronomik L-2 UV-IR Blocking Filter - 50 mm Round - L2-50R
    $109.95
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  • Astronomik 50 mm Round L-3 UV-IR Blocking Filter
    Astronomik Filters Astronomik L-3 UV-IR Blocking Filter - 50 mm Round - L3-50R
    $129.95
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  • Astronomik 50 mm Square H-Alpha 12 nm CCD Filter
    Astronomik Filters Astronomik H-Alpha 12 nm CCD Filter - 50 mm Square - HA12-50SQ
    $329.95
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  • Astronomik H-Alpha 6 nm CCD Filter - 50x50 mm
    Astronomik Filters Astronomik H-Alpha 6 nm CCD Filter - 50 mm Square - HA6-50SQ
    $499.95
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  • Astronomik L-1 Luminance UV-IR Blocking Filter - 50 mm Square
    Astronomik Filters Astronomik L-1 UV-IR Blocking Filter - 50 mm Square - L1-50SQ
    $179.95
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  • Astronomik UV-IR Blocking L-2 Luminance Filter - 50x50 mm
    Astronomik Filters Astronomik L-2 UV-IR Blocking Filter - 50 mm Square - L2-50SQ
    $149.95
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  • Astronomik L-3 Luminance UV-IR Blocking Filter - 50x50 mm
    Astronomik Filters Astronomik L-3 UV-IR Blocking Filter - 50 mm Square - L3-50SQ
    $179.95
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  • Astronomik 50 mm x 50 mm OIII 12 nm CCD Filter
    Astronomik Filters Astronomik OIII 12 nm CCD Filter - 50 mm Square - OIIICCD-50SQ
    $329.95
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  • Astronomik 50 mm Square OIII 6 nm CCD Filter
    Astronomik Filters Astronomik OIII 6 nm CCD Filter - 50 mm Square - OIIICCD6-50SQ
    $499.95
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  • Astronomik 50 mm ProPlanet 642 IR-Pass Filter - Round
    Astronomik Filters Astronomik ProPlanet 642 IR Pass Filter - 50 mm Round - P642-50R
    $129.95
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  • Astronomik 50x50 mm ProPlanet 642 IR-Pass Filter
    Astronomik Filters Astronomik ProPlanet 642 IR Pass Filter - 50 mm Square - P642-50SQ
    $159.95
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  • Astronomik 50 mm x 50 mm SII 12 nm CCD Filter
    Astronomik Filters Astronomik SII 12 nm CCD Filter - 50 mm Square - SII-50SQ
    $329.95
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  • Astronomik SII 6 nm CCD 50 mm Square Filter
    Astronomik Filters Astronomik SII 6 nm CCD Filter - 50 mm Square - SII6-50SQ
    $499.95
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  • Astronomik 50 mm Square Deep Sky RGB Color Filter Set
    Astronomik Filters Astronomik Deep Sky RGB Color Filter Set - 50 mm Square - DRGB-50SQ
    $699.95
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  • Astronomik Luminance Filter Type 2C - 50 mm Round Mounted
    Astronomik Filters Astronomik Luminance Filter Type 2C - 50 mm Round Mounted - L-50R
    $99.95 $84.95
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  • Baader 50 x 50 mm Square Unmounted UV-IR Cut Luminance Filter
    Baader Planetarium Baader Planetarium 50 mm Square UV-IR Cut L-Filter - FUVIR-SQ50
    $219.00
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  • Astrodon 50 mm Round Unmounted Generation 2 I-Series LRGB Tru-Balance Filter Set
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 49.7 mm Round Unmounted - LRGB2-I50R
    $1,188.00
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  • Astrodon 50 mm Round Unmounted Luminance Gen2 UV/NIR Block Filter
    Astrodon Astrodon Luminance Gen2 UV/NIR Blocking Filter - 49.7 mm Round Unmounted - L2-50R
    $318.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm H-Alpha Narrowband Filter - 49.7 mm Round Unmounted - HA5-50R
    $870.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm SII Narrowband Filter - 49.7 mm Round Unmounted - SII5-50R
    $870.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm OIII Narrowband Filter - 49.7 mm Round Unmounted - OIII5-50R
    $870.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm Red Continuum Narrowband Filter - 49.7 mm Round Unmounted - REDCON5-50R
    $870.00
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  • Astrodon UVenus UV Imaging Filter
    Astrodon Astrodon UVenus UV Imaging Filter - 49.7 mm Round Unmounted - UVENUS-50R
    $462.00
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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.

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