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Filters

8 Items
Optolong H-Alpha Unmounted Filter

Optolong H-Alpha 7nm CCD Filter - 31mm Unmounted - HAL7-31U

SKU: OTL-HAL7-31U
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$190.00
Astronomik 31 mm Round H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 31 mm Round - HA12-31

SKU: ASF-HA12-31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$169.95
Astronomik 6 nm H-Alpha Filter in 31 mm Format

Astronomik H-Alpha 6 nm CCD Filter - 31 mm Round - HA6-31

SKU: ASF-HA6-31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$249.95

ZWO H-Alpha 7nm CCD Filter - 31mm - HA31

SKU: ZWO-HA31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$149.00

Astrodon 3 nm H-Alpha Narrowband Filter - 31 mm Unthreaded Insert - HA3-31R

SKU: ASD-HA3-31R
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$574.00

Astrodon 5 nm H-Alpha Narrowband Filter - 31 mm Unthreaded Insert - HA5-31R

SKU: ASD-HA5-31R
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$390.00
Baader 31 mm Round Ultra Narrowband 3.5 nm H-Alpha CCD Filter

Baader Planetarium Ultra Narrowband 3.5 nm H-Alpha CCD Filter - 31 mm Round - FHALNU-RD31

SKU: BAD-FHALNU-RD31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Threaded
Free shipping Free shipping
$336.00

Baader Planetarium f/2 Highspeed Narrowband H-Alpha CCD Filter - 31mm Unmounted - FHALHS-RD31

SKU: BAD-FHALHS-RD31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
$209.00