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Filters

11 Items
Astrodon 3 nm OIII Narrowband Filter - 50 mm Round

Astrodon 3 nm OIII Narrowband Filter - 49.7 mm Round Unmounted - OIII3-50R

SKU: ASD-OIII3-50R
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$1,145.00
Baader OIII 8.5 nm Filter - 50 mm Square Unmounted

Baader OIII 8.5 nm Narrowband CCD Filter - 50 mm Square Unmounted - FOIIIN-SQ50

SKU: BAD-FOIIIN-SQ50
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$374.00
Astronomik OIII 12 nm CCD Filter - 50 mm Round

Astronomik OIII 12 nm CCD Filter - 50 mm Round - OIIICCD-50R

SKU: ASF-OIIICCD-50R
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$299.95
Astronomik 50 mm Round 6 nm OIII CCD Filter

Astronomik OIII 6 nm CCD Filter - 50 mm Round - OIIICCD6-50R

SKU: ASF-OIIICCD6-50R
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$469.95
Astronomik 50 mm x 50 mm OIII 12 nm CCD Filter

Astronomik OIII 12 nm CCD Filter - 50 mm Square - OIIICCD-50SQ

SKU: ASF-OIIICCD-50SQ
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$329.95
Astronomik 50 mm Square OIII 6 nm CCD Filter

Astronomik OIII 6 nm CCD Filter - 50 mm Square - OIIICCD6-50SQ

SKU: ASF-OIIICCD6-50SQ
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$499.95
Astrodon Narrowband Filters

Astrodon 5 nm OIII Narrowband Filter - 49.7 mm Round Unmounted - OIII5-50R

SKU: ASD-OIII5-50R
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$870.00
Astrodon Narrowband Filters

Astrodon 3 nm OIII Narrowband Filter - 49.7 mm Square Unmounted - OIII3-50S

SKU: ASD-OIII3-50S
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$1,438.00
Astrodon Narrowband Filters

Astrodon 5 nm OIII Narrowband Filter - 49.7 mm Square Unmounted - OIII5-50S

SKU: ASD-OIII5-50S
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$1,024.00
Baader 50 mm Round Ultra Narrowband 4.5 nm OIII CCD Filter

Baader Planetarium Ultra Narrowband 4.5 nm OIII CCD Filter - 50 mm Round - FOIIINU-RD50

SKU: BAD-FOIIINU-RD50
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$479.00
Baader Planetarium 50 mm x 50 mm Ultra Narrowband 4.5 nm OIII CCD Filter

Baader Planetarium Ultra Narrowband 4.5 nm OIII CCD Filter - 50x50 mm Square - FOIIINU-SQ50

SKU: BAD-FOIIINU-SQ50
  • Filter Type: OIII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Threaded
Free shipping Free shipping
$567.00

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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