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Filters

11 Items
Astrodon 3 nm SII Narrowband 49.7 mm Round Filter

Astrodon 3 nm SII Narrowband Filter - 65 mm Square Unmounted - SII3-65S

SKU: ASD-SII3-65S
  • Filter Type: SII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$2,495.00

Astrodon 3 nm H-Alpha Narrowband Filter - 65 mm Square Unmounted - HA3-65S

SKU: ASD-HA3-65S
  • Filter Type: H-Alpha
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$2,495.00

Astrodon 3 nm OIII Narrowband Filter - 65 mm Square Unmounted - OIII3-65S

SKU: ASD-OIII3-65S
  • Filter Type: OIII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$2,495.00
Baader 65 mm Square LRGBC Filter Set

Baader LRGBC CCD Filter Set - 65 mm Square Unmounted - FLRGBC-SQ65

SKU: BAD-FLRGBC-SQ65
  • Filter Type: RGB
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$1,029.00
Baader 65 mm Square LRGB Filter Set

Baader LRGB CCD Filter Set - 65 mm Square Unmounted - FLRGB-SQ65

SKU: BAD-FLRGB-SQ65
  • Filter Type: RGB
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$949.00
Baader SII 8nm Narrowband Filter - 65 mm Square

Baader S-II 8 nm Narrowband CCD Filter - 65 mm Square Unmounted - FSIIN-SQ65

SKU: BAD-FSIIN-SQ65
  • Filter Type: SII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$479.00
Baader OIII 8.5 nm Filter - 65 mm Square Unmounted

Baader OIII 8.5 nm Narrowband CCD Filter - 65 mm Square Unmounted - FOIIIN-SQ65

SKU: BAD-FOIIIN-SQ65
  • Filter Type: OIII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$492.00
Baader 65 mm Square Unmounted H-alpha 7 nm Narrowband Filter

Baader H-Alpha 7 nm Narrowband CCD Filter - 65 mm Square Unmounted - FHALN-SQ65

SKU: BAD-FHALN-SQ65
  • Filter Type: H-Alpha
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$523.00
Baader Planetarium 65x65 mm Square Ultra Narrowband H-Alpha 3.5 nm CCD Filter

Baader Planetarium Ultra Narrowband 3.5 nm H-Alpha CCD Filter - 65 mm Square - FHALNU-SQ65

SKU: BAD-FHALNU-SQ65
  • Filter Type: H-Alpha
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Threaded
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$759.00
Baader Planetarium Ultra Narrowband 4.5 nm OIII CCD Filter - 65 mm Square

Baader Planetarium Ultra Narrowband 4.5 nm OIII CCD Filter - 65x65 mm Square - FOIIINU-SQ65

SKU: BAD-FOIIINU-SQ65
  • Filter Type: OIII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Threaded
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$689.00
Baader Planetarium 65 mm Square Ultra Narrowband 4.5 nm SII CCD Filter

Baader Planetarium Ultra Narrowband 4.5 nm SII CCD Filter - 65x65 mm Square - FSIINU-SQ65

SKU: BAD-FSIINU-SQ65
  • Filter Type: SII
  • Filter Size: 65 mm
  • Filter Shape: Square
  • Filter Insert Style: Threaded
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$689.00

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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