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Filters

Items 1 - 25 of 32

Optolong Clear Focusing Filter - 1.25" Mounted - CFF-125

SKU: OTL-CFF-125
  • Filter Type: Clear
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$24.00

Optolong Clear Focusing Filter - 2" Mounted - CFF-200

SKU: OTL-CFF-200
  • Filter Type: Clear
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$31.00

Baader EOS Protective Wide T-Ring with Clear Filter - DSLRT-CLR

SKU: BAD-DSLRT-CLR
  • Filter Type: Clear
  • Filter Size: 50.4 mm
  • Filter Shape: Round
  • Filter Insert Style: Threaded
$143.00

ZWO 1.25" Low Profile Clear Filter - LPFAR125

SKU: ZWO-LPFAR125
  • Filter Type: Clear
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
$20.00 $18.00
Astronomik 36 mm Round MC Clear Filter

Astronomik MC Clear Glass Filter - 36 mm Round - C-36

SKU: ASF-C-36
  • Filter Type: Clear
  • Filter Size: 36 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$59.95
Astronomik 1.25" Round Mounted MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 1.25" Round Mounted - C-1

SKU: ASF-C-1
  • Filter Type: Clear
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$39.95
Astronomik 2" Round Mounted MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 2" Round Mounted - C-2

SKU: ASF-C-2
  • Filter Type: Clear
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$69.95
Astronomik 31 mm Round Mounted MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 31 mm Round - C-31

SKU: ASF-C-31
  • Filter Type: Clear
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$49.95
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 MC Clear Glass EOS Clip Filter

Astronomik MC Clear Glass Filter - EOS Clip - C-EOS

SKU: ASF-C-EOS
  • Filter Type: Clear
  • Filter Size: EOS APS Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
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$69.95
Astronomik MC Clear Glass EOS XL Full Frame Clip Filter

Astronomik MC Clear Glass Filter - EOS XL Full Frame Clip - C-EOSXL

SKU: ASF-C-EOSXL
  • Filter Type: Clear
  • Filter Size: EOS Full Frame Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
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$79.95
Astronomik MC Clear Filter - SC Rear Cell

Astronomik MC Clear Glass Filter - SCT Rear Cell - C-SCT

SKU: ASF-C-SCT
  • Filter Type: Clear
  • Filter Size: SCT Rear Cell
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$69.95
Astronomik MC Clear Glass T-Mount Filter

Astronomik MC Clear Glass Filter - T-Mount - C-T

SKU: ASF-C-T
  • Filter Type: Clear
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$65.95 $52.76
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
Astrodon ExoPlanet Light Curve Filter with Blue Blocking

Astrodon Exo-Planet Clear Filter with Blue Blocking - 1.25" Threaded Cell - XOPBB-27R

SKU: ASD-XOPBB-27R
  • Filter Type: Clear
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
$185.00
Astrodon 49.7 mm Round Unmounted Clear Filter with UV Blocking Only (No NIR Blocking)

Astrodon Clear Filter with UV-Blocking Only - 49.7 mm Round Unmounted - C2-50R

SKU: ASD-C2-50R
  • Filter Type: Clear
  • Filter Size: 50 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$311.00
Astrodon 49.7 mm Round Unmounted Clear Filter with UV Blocking Only (No NIR Blocking)

Astrodon Clear Filter with UV-Blocking Only - 49.7 mm Square Unmounted - C2-50S

SKU: ASD-C2-50S
  • Filter Type: Clear
  • Filter Size: 50 mm
  • Filter Shape: Square
  • Filter Insert Style: Drop-In
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$368.00
Astronomik 27 mm Round MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 27 mm Round - C-27

SKU: ASF-C-27
  • Filter Type: Clear
  • Filter Size: 27 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
$35.95
Astronomik MC Clear Glass EOS M Clip Filter

Astronomik MC Clear Glass Clip Filter for Canon EOS M Series Cameras - C-EOS-M

SKU: ASF-C-EOS-M
  • Filter Type: Clear
  • Filter Size: EOS M Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
$89.95
Astronomik MC Clear Glass Sony Alpha 7 Clip Filter

Astronomik MC Clear Glass Sony Alpha 7 Clip Filter - C-SONY

SKU: ASF-C-SONY
  • Filter Type: Clear
  • Filter Size: Sony Alpha 7 Clip
  • Filter Shape: Sony Clip
  • Filter Insert Style: Clip-In
$109.95
Astronomik MC Clear Glass Filter - XT EOS Clip

Astronomik MC Clear Glass EOS XT Clip Filter - C-EOS-XT

SKU: ASF-C-EOS-XT
  • Filter Type: Clear
  • Filter Size: EOS XT APS Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
$89.95
Astronomik MC Clear Glass Clip Filter for Canon EOS 5D DSLR Cameras

Astronomik MC Clear Glass Clip Filter for Canon EOS 5D Mk2 and 5D Mk3 DSLR Cameras - C-EOS-5D

SKU: ASF-C-EOS-5D
  • Filter Type: Clear
  • Filter Size: EOS APS Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
$79.95

Astrodon Clear Filter with UV-Blocking Only - 1.25" Threaded Cell - C2-27R

SKU: ASD-C2-27R
  • Filter Type: Clear
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$173.00
Astronomik MC Clear Glass Clip Filter for Canon EOS 1000D, 100D, 450D-760D, 40D-70D, and 7D DSLR Cameras

Astronomik MC Clear Glass Cover for Canon EOS 1000D, 100D, 450D-760D, 40D-70D, & 7D DSLR Cameras - C-EOS-1000D

SKU: ASF-C-EOS-1000D
  • Filter Type: Clear
  • Filter Size: Select Canon EOS DSLR Sensors
  • Filter Shape: Replacement Glass
$65.95
Astronomik MC Clear Glass Clip Filter for Canon EOS 350D, 20D, 20Da, and 30D DSLR Cameras

Astronomik MC Clear Glass Clip Filter for Canon EOS 350D, 20D, 20Da, and 30D DSLR Cameras - C-EOS-350D

SKU: ASF-C-EOS-350D
  • Filter Type: Clear
  • Filter Size: EOS APS Clip
  • Filter Shape: EOS Clip
  • Filter Insert Style: Clip-In
$55.95

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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