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Filters

18 Items
Astronomik T-Thread CLS CCD Light Pollution Filter

Astronomik CLS CCD Light Pollution Filter - T-Mount - CLSCCD-T

SKU: ASF-CLSCCD-T
  • Filter Type: CLS/LPR
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$179.95
Astronomik UV-IR L3 Luminance Filter - T-Mount

Astronomik L-3 Luminance UV-IR Block Filter - T-Mount - L3-T

SKU: ASF-L3-T
  • Filter Type: UV/IR/Luminance
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$129.95
Astronomik 6 nm OIII CCD T-Mount Filter

Astronomik OIII 6 nm CCD Filter - T-Mount - OIIICCD6-T

SKU: ASF-OIIICCD6-T
  • Filter Type: OIII
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$419.95
Astronomik OIII 12 nm CCD T-Mount Filter

Astronomik OIII 12 nm CCD Filter - T-Mount - OIIICCD-T

SKU: ASF-OIIICCD-T
  • Filter Type: OIII
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$269.95
Astronomik SII 6 nm T-Mount CCD Filter

Astronomik SII 6 nm CCD Filter - T-Mount - SII6-T

SKU: ASF-SII6-T
  • Filter Type: SII
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$419.95
Astronomik T-Thread CLS Light Pollution Filter

Astronomik CLS Light Pollution Filter - T-Mount - CLS-T

SKU: ASF-CLS-T
  • Filter Type: CLS/LPR
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$139.95
Astronomik H-Alpha 12 nm T-Mount CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - T-Mount - HA12-T

SKU: ASF-HA12-T
  • Filter Type: H-Alpha
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$269.95
Astronomik T-Thread IR-Blocking Filter

Astronomik IR Blocking Filter - T-Mount - IR-T

SKU: ASF-IR-T
  • Filter Type: UV/IR/Luminance
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$65.95
Astronomik 6 nm H-Alpha T-Thread CCD Filter

Astronomik H-Alpha 6 nm CCD Filter - T-Mount - HA6-T

SKU: ASF-HA6-T
  • Filter Type: H-Alpha
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$419.95
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 L-1 UV-IR Blocking Filter - T-Thread Mount

Astronomik L-1 UV-IR Blocking Filter - T-Mount - L1-T

SKU: ASF-L1-T
  • Filter Type: UV/IR/Luminance
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$129.95
Astronomik UV-IR Blocking L-2 Luminance T-Mount Filter

Astronomik L-2 UV-IR Blocking Filter - T-Mount - L2-T

SKU: ASF-L2-T
  • Filter Type: UV/IR/Luminance
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$109.95
Astronomik LRGB Color Filter Set - T-Thread Mounted

Astronomik LRGB Filter Set - T-Mount - LRGB-T

SKU: ASF-LRGB-T
  • Filter Type: RGB
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$419.95
Astronomik ProPlanet 642 IR-Pass Filter - T-Thread Mounted

Astronomik ProPlanet 642 IR Pass Filter - T-Mount - P642-T

SKU: ASF-P642-T
  • Filter Type: Pro Planet
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$119.95
Astronomik ProPlanet 742 IR-Pass Filter - T-Mount

Astronomik ProPlanet 742 IR Pass Filter - T-Mount - P742-T

SKU: ASF-P742-T
  • Filter Type: Pro Planet
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$85.95
Astronomik T-Thread Mounted ProPlanet 807 IR-Pass Filter

Astronomik ProPlanet 807 IR Pass Filter - T-Mount - P807-T

SKU: ASF-P807-T
  • Filter Type: Pro Planet
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$85.95
Astronomik SII 12 nm CCD T-Mount Filter

Astronomik SII 12 nm CCD Filter - T-Mount - SII-T

SKU: ASF-SII-T
  • Filter Type: SII
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$269.95
Astronomik UHC-E T-Thread Mount Filter

Astronomik UHC-E Filter - T-Mount - UHCE-T

SKU: ASF-UHCE-T
  • Filter Type: UHC
  • Filter Size: M42 x 0.75 mm (T-Thread)
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$109.95

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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