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Filters

Items 1 - 25 of 94
Astrodon ExoPlanet Light Curve Filter with Blue Blocking

Astrodon Exo-Planet Clear Filter with Blue Blocking - 49.7 mm Round Unmounted - XOPBB-50R

SKU: ASD-XOPBB-50R
  • Filter Type: Clear
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$285.00

Astrodon 3 nm H-Alpha Narrowband Filter - 49.7 mm Round Unmounted - HA3-50R

SKU: ASD-HA3-50R
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$1,145.00
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
Astrodon 3 nm SII Narrowband 49.7 mm Round Filter

Astrodon 3 nm SII Narrowband Filter - 49.7 mm Round Unmounted - SII3-50R

SKU: ASD-SII3-50R
  • Filter Type: SII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$1,145.00
Baader 50 mm Square 3.5 nm H-Alpha Enforced Narrowband Filter

Baader 3.5 nm H-Alpha Enforced Narrowband CCD Filter - 50 mm Square Unmounted - FHALNU-SQ50

SKU: BAD-FHALNU-SQ50
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$599.00
Baader 8.5 nm H-Beta Filter - 50 mm Square

Baader 8.5 nm H-Beta Narrowband CCD Filter - 50 mm Square Unmounted - FHBN-SQ50

SKU: BAD-FHBN-SQ50
  • Filter Type: H-Beta
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$399.00
Baader SII 8nm Narrowband Filter - 50 mm Square

Baader S-II 8 nm Narrowband CCD Filter - 50 mm Square Unmounted - FSIIN-SQ50

SKU: BAD-FSIIN-SQ50
  • Filter Type: SII
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$360.00
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
Baader 50 mm Square Unmounted H-alpha 7 nm Narrowband Filter

Baader H-Alpha 7 nm Narrowband CCD Filter - 50 mm Square Unmounted - FHALN-SQ50

SKU: BAD-FHALN-SQ50
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$419.00
Baader 50 mm Square Unmounted UV-IR Cut/L Filter

Baader UV-IR-Cut L Filter - 65 mm Square Unmounted - FUVIR-SQ65

SKU: BAD-FUVIR-SQ65
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$267.00
Baader 50 mm Square Unmounted 35 nm H-Alpha CCD Filter

Baader 35 nm Midband H-Alpha CCD Filter - 50 mm Square Unmounted - FHAL-SQ50

SKU: BAD-FHAL-SQ50
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$264.00
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 Luminance Filter Type 2C - 50 mm Round Mounted

Astronomik Luminance Filter Type 2C - 50 mm Round Mounted - L-50R

SKU: ASF-L-50R
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$99.95 $84.95
Baader 50 x 50 mm Square Unmounted UV-IR Cut Luminance Filter

Baader Planetarium 50 mm Square UV-IR Cut L-Filter - FUVIR-SQ50

SKU: BAD-FUVIR-SQ50
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$219.00
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 Round SII 12 nm CCD Filter

Astronomik SII 12 nm CCD Filter - 50 mm Round - SII-50R

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

Astronomik SII 6 nm CCD Filter - 50 mm Round - SII6-50R

SKU: ASF-SII6-50R
  • Filter Type: SII
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$469.95
Astronomik 50 mm Round MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 50 mm Round - C-50R

SKU: ASF-C-50R
  • Filter Type: Clear
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$59.95
Astronomik 50 mm Round CLS Light Pollution Filter

Astronomik CLS Light Pollution Filter - 50 mm Round - CLS-50R

SKU: ASF-CLS-50R
  • Filter Type: CLS/LPR
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$159.95
Astronomik 50 mm Round CLS CCD Light Pollution Filter

Astronomik CLS CCD Light Pollution Filter - 50 mm Round - CLSCCD-50R

SKU: ASF-CLSCCD-50R
  • Filter Type: CLS/LPR
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$199.95
Astronomik 50 mm Round H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 50 mm Round - HA12-50R

SKU: ASF-HA12-50R
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$299.95
Astronomik 50 mm Round H-Alpha 6 nm CCD Filter

Astronomik H-Alpha 6 nm CCD Filter - 50 mm Round - HA6-50R

SKU: ASF-HA6-50R
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$469.95
Astronomik L-1 UV-IR Blocking Luminance Filter - 50 mm Round

Astronomik L-1 UV-IR Blocking Filter - 50 mm Round - L1-50R

SKU: ASF-L1-50R
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$129.95
Astronomik L-2 UV-IR Blocker - 50 mm Round Filter

Astronomik L-2 UV-IR Blocking Filter - 50 mm Round - L2-50R

SKU: ASF-L2-50R
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$109.95
Astronomik 50 mm Round L-3 UV-IR Blocking Filter

Astronomik L-3 UV-IR Blocking Filter - 50 mm Round - L3-50R

SKU: ASF-L3-50R
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$129.95

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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