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Filters

Items 1 - 25 of 77
Baader 1.25" 35 nm H-Alpha Filter

Baader 35 nm Midband H-Alpha CCD Filter - 1.25" Mounted - FHAL-1

SKU: BAD-FHAL-1
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
$109.00
Baader 2" Mounted 35 nm H-Alpha CCD Filter

Baader 35 nm Midband H-Alpha CCD Filter - 2" Mounted - FHAL-2

SKU: BAD-FHAL-2
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$199.00
Baader Planetarium H-Alpha 7 nm Narrowband CCD Filter - 1.25"

Baader H-Alpha 7 nm Narrowband CCD Filter - 1.25" - FHALN-1

SKU: BAD-FHALN-1
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$199.00
Baader Planetarium 2" H-alpha 7 nm Narrowband Filter

Baader H-Alpha 7 nm Narrowband CCD Filter - 2" Mounted - FHALN-2

SKU: BAD-FHALN-2
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$309.00

Optolong H-Alpha 7nm CCD Filter - 1.25" Mounted - HAL7-125

SKU: OTL-HAL7-125
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$175.00

Optolong H-Alpha 7nm CCD Filter - 2" Mounted - HAL7-200

SKU: OTL-HAL7-200
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$259.00

Optolong Night Sky H-Alpha Filter - 1.25" Mounted - NSHA-125

SKU: OTL-NSHA-125
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$79.00

Optolong Night Sky H-Alpha Filter - 2" Mounted - NSHA-200

SKU: OTL-NSHA-200
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$119.00
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
Optolong H-Alpha Unmounted Filter

Optolong H-Alpha 7nm CCD Filter - 36mm Unmounted - HAL7-36U

SKU: OTL-HAL7-36U
  • Filter Type: H-Alpha
  • Filter Size: 36 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$193.00

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 H-Alpha Narrowband Filter - 36 mm Round Unmounted - HA3-36R

SKU: ASD-HA3-36R
  • Filter Type: H-Alpha
  • Filter Size: 36 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$748.00
Astrodon 36 mm Round H-Alpha 5 nm Narrowband Filter

Astrodon 5 nm H-Alpha Narrowband Filter - 36 mm Round - HA5-36R

SKU: ASD-HA5-36R
  • Filter Type: H-Alpha
  • Filter Size: 36 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$501.00

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
Astronomik 1.25" Round Mounted H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 1.25" Round Mounted - HA12-1

SKU: ASF-HA12-1
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$129.95
Astronomik 2" Round Mounted H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 2" Round Mounted - HA12-2

SKU: ASF-HA12-2
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$289.95
Astronomik H-Alpha 12 nm EOS Clip Filter

Astronomik H-Alpha 12 nm EOS Clip Filter - HA12-EOS

SKU: ASF-HA12-EOS
  • Filter Type: H-Alpha
  • Filter Size: EOS APS Clip
  • Filter Shape: Round
  • Filter Insert Style: Clip-In
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$189.95
Ha Filter Installed in T-Ring on EOS Camera (camera not included)

Baader EOS Protective Wide T-Ring with 7nm H-Alpha Filter - DSLRT-HA

SKU: BAD-DSLRT-HA
  • Filter Type: H-Alpha
  • Filter Size: 50.4 mm
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$357.00 $285.60
Lumicon Night Sky H-Alpha Filter - 2"

Lumicon Night Sky Hydrogen-Alpha Filter - 2" - LF3090

SKU: LUM-LF3090
  • Filter Type: H-Alpha
  • Filter Size: 50.8 mm (2")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
$76.00
Astronomik 6 nm H-Alpha Filter in 1.25" Format

Astronomik H-Alpha 6 nm CCD Filter - 1.25" Round Mounted - HA6-1

SKU: ASF-HA6-1
  • Filter Type: H-Alpha
  • Filter Size: 31.75 mm (1.25")
  • Filter Shape: Round
  • Filter Insert Style: Threaded
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$199.95
Baader 36 mm H-alpha 7 nm Narrowband Filter

Baader H-Alpha 7 nm Narrowband CCD Filter - 36 mm Unmounted - FHALN-RD36

SKU: BAD-FHALN-RD36
  • Filter Type: H-Alpha
  • Filter Size: 36 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$195.00
Baader 50.4 mm Round Unmounted H-alpha 7 nm Narrowband Filter

Baader H-Alpha 7 nm Narrowband CCD Filter - 50.4 mm Round Unmounted - FHALN-RD50

SKU: BAD-FHALN-RD50
  • Filter Type: H-Alpha
  • Filter Size: 50.4 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$354.00
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 50.4 mm Round Unmounted 35 nm H-Alpha CCD Filter

Baader 35 nm Midband H-Alpha CCD Filter - 50.4 mm Round Unmounted - FHAL-RD50

SKU: BAD-FHAL-RD50
  • Filter Type: H-Alpha
  • Filter Size: 50.4 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$214.00

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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