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Filters

Items 1 - 25 of 64
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 50 mm Square LRGBC Filter Set

Baader LRGBC CCD Filter Set - 50 mm Square Unmounted - FLRGBC-SQ50

SKU: BAD-FLRGBC-SQ50
  • Filter Type: RGB
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$849.00
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 50 mm Square LRGB Filter Set

Baader LRGB CCD Filter Set - 50 mm Square Unmounted - FLRGB-SQ50

SKU: BAD-FLRGB-SQ50
  • Filter Type: RGB
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$789.00
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 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 - 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 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 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 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 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 Giant UV-IR Cut Filter for Pro Movie Cameras (1.25" filter not included)

Baader UV-IR-Cut L Filter - 101 mm x 143 mm Square Unmounted - FUVIR-SQ100

SKU: BAD-FUVIR-SQ100
  • Filter Type: UV/IR/Luminance
  • Filter Size: 100 mm & Up
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$499.00
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
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
Astronomik 50x50 mm MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 50 mm Square - C-50SQ

SKU: ASF-C-50SQ
  • Filter Type: Clear
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$89.95
Astronomik CLS Light Pollution Filter - 50x50 mm Square

Astronomik CLS Light Pollution Filter - 50 mm Square - CLS-50SQ

SKU: ASF-CLS-50SQ
  • Filter Type: CLS/LPR
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$189.95
Astronomik 50x50 mm CLS CCD Light Pollution Filter

Astronomik CLS CCD Light Pollution Filter - 50 mm Square - CLSCCD-50SQ

SKU: ASF-CLSCCD-50SQ
  • Filter Type: CLS/LPR
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$249.95
Astronomik 50 mm Square H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 50 mm Square - HA12-50SQ

SKU: ASF-HA12-50SQ
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$329.95
Astronomik H-Alpha 6 nm CCD Filter - 50x50 mm

Astronomik H-Alpha 6 nm CCD Filter - 50 mm Square - HA6-50SQ

SKU: ASF-HA6-50SQ
  • Filter Type: H-Alpha
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$499.95
Astronomik L-1 Luminance UV-IR Blocking Filter - 50 mm Square

Astronomik L-1 UV-IR Blocking Filter - 50 mm Square - L1-50SQ

SKU: ASF-L1-50SQ
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$179.95
Astronomik UV-IR Blocking L-2 Luminance Filter - 50x50 mm

Astronomik L-2 UV-IR Blocking Filter - 50 mm Square - L2-50SQ

SKU: ASF-L2-50SQ
  • Filter Type: UV/IR/Luminance
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$149.95

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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