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Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.

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Narrowband Filters

  • Original price $484.00 USD
    Original price $484.00 USD - Original price $484.00 USD
    Original price $484.00 USD
    Current price $425.00 USD
    $425.00 USD - $425.00 USD
    Current price $425.00 USD

    Astrodon SII Filter - 5nm

    DON-SII5_31R
    Only 1 left!

    If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next...

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    Original price $484.00 USD
    Original price $484.00 USD - Original price $484.00 USD
    Original price $484.00 USD
    Current price $425.00 USD
    $425.00 USD - $425.00 USD
    Current price $425.00 USD
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  • Original price $844.00 USD - Original price $1,879.00 USD
    Original price
    $844.00 USD - $1,879.00 USD
    $844.00 USD - $1,879.00 USD
    Current price $844.00 USD

    Baader 3.5/4nm f/2 Ultra-Highspeed Filter Set - CMOS-Optimized H-alpha/O-III/S-II

    Options available

    f/2 Highspeed Filterset consisting of 3 Filter: H-alpha, O III and S II. Highspeed Narrowband Filter are designed especially for the delicate requ...

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    Original price $844.00 USD - Original price $1,879.00 USD
    Original price
    $844.00 USD - $1,879.00 USD
    $844.00 USD - $1,879.00 USD
    Current price $844.00 USD
  • Original price $829.00 USD - Original price $1,769.00 USD
    Original price
    $829.00 USD - $1,769.00 USD
    $829.00 USD - $1,769.00 USD
    Current price $829.00 USD

    Baader 3.5nm / 4nm Narrowband Filter Set - CMOS-Optimized H-alpha/O-III/S-II

    Options available

    Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H-...

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    Original price $829.00 USD - Original price $1,769.00 USD
    Original price
    $829.00 USD - $1,769.00 USD
    $829.00 USD - $1,769.00 USD
    Current price $829.00 USD
  • Original price $285.00 USD - Original price $617.00 USD
    Original price
    $285.00 USD - $617.00 USD
    $285.00 USD - $617.00 USD
    Current price $285.00 USD

    Baader 4nm Ultra-Narrowband OIII Filter - CMOS-Optimized

    Options available

    Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H-...

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    Original price $285.00 USD - Original price $617.00 USD
    Original price
    $285.00 USD - $617.00 USD
    $285.00 USD - $617.00 USD
    Current price $285.00 USD
  • Original price $489.00 USD - Original price $1,169.00 USD
    Original price
    $489.00 USD - $1,169.00 USD
    $489.00 USD - $1,169.00 USD
    Current price $489.00 USD

    Baader 6.5nm f/2 Highspeed Filter Set - CMOS-Optimized H-alpha/O-III/S-II

    Options available
    1 variants in stock

    f/2 Highspeed Filterset consisting of 3 Filter: H-alpha, O III and S II. Highspeed Narrowband Filter are designed especially for the delicate requ...

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    Original price $489.00 USD - Original price $1,169.00 USD
    Original price
    $489.00 USD - $1,169.00 USD
    $489.00 USD - $1,169.00 USD
    Current price $489.00 USD
  • Original price $167.00 USD - Original price $429.00 USD
    Original price
    $167.00 USD - $429.00 USD
    $167.00 USD - $429.00 USD
    Current price $167.00 USD

    Baader 6.5nm H-alpha Filter - CMOS-Optimized

    Options available

    Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Reflex-...

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    Original price $167.00 USD - Original price $429.00 USD
    Original price
    $167.00 USD - $429.00 USD
    $167.00 USD - $429.00 USD
    Current price $167.00 USD
  • Original price $457.00 USD - Original price $1,149.00 USD
    Original price
    $457.00 USD - $1,149.00 USD
    $457.00 USD - $1,149.00 USD
    Current price $457.00 USD

    Baader 6.5nm Narrowband Filter Set - CMOS-Optimized H-alpha/O-III/S-II

    Options available

    Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Reflex-...

    View full details
    Original price $457.00 USD - Original price $1,149.00 USD
    Original price
    $457.00 USD - $1,149.00 USD
    $457.00 USD - $1,149.00 USD
    Current price $457.00 USD
  • Original price $159.00 USD - Original price $419.00 USD
    Original price
    $159.00 USD - $419.00 USD
    $159.00 USD - $419.00 USD
    Current price $159.00 USD

    Baader 6.5nm OIII Filter - CMOS-Optimized

    Options available

    6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Reflex-Blocker ™ hard coated and planoptically polished - with sealed coating...

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    Original price $159.00 USD - Original price $419.00 USD
    Original price
    $159.00 USD - $419.00 USD
    $159.00 USD - $419.00 USD
    Current price $159.00 USD
  • Original price $157.00 USD - Original price $417.00 USD
    Original price
    $157.00 USD - $417.00 USD
    $157.00 USD - $417.00 USD
    Current price $157.00 USD

    Baader 6.5nm SII Filter - CMOS-Optimized

    Options available

    6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Reflex-Blocker ™ hard coated and planoptically polished - with sealed coating...

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    Original price $157.00 USD - Original price $417.00 USD
    Original price
    $157.00 USD - $417.00 USD
    $157.00 USD - $417.00 USD
    Current price $157.00 USD
  • Original price $109.00 USD - Original price $264.00 USD
    Original price
    $109.00 USD - $264.00 USD
    $109.00 USD - $264.00 USD
    Current price $109.00 USD

    Baader H-Alpha CCD Filter -35nm

    Options available

    Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8 IR-blocked NO halos, NO reflections, NO ghosting Non-aging ...

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    Original price $109.00 USD - Original price $264.00 USD
    Original price
    $109.00 USD - $264.00 USD
    $109.00 USD - $264.00 USD
    Current price $109.00 USD
  • Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD

    Chroma H-alpha Filter - 3nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

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    Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD
  • Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD

    Chroma H-alpha Filter - 5nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

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    Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD
  • Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD

    Chroma H-alpha Filter - 8nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

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    Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD
  • Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD

    Chroma H-alpha Filter Optimized for f/3 - 3nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

    View full details
    Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD
  • Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD

    Chroma H-alpha Filter Optimized for f/3 - 5nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

    View full details
    Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD
  • Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD

    Chroma H-alpha Filter Optimized for f/3 - 8nm

    Options available

    H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...

    View full details
    Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD
  • Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD

    Chroma H-beta Filter - 3nm

    Options available

    H-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H...

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    Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD
  • Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD

    Chroma H-beta Filter - 5nm

    Options available

    H-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H...

    View full details
    Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD
  • Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD

    Chroma OIII Filter - 3nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

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    Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD
  • Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD

    Chroma OIII Filter - 5nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

    View full details
    Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD
  • Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD

    Chroma OIII Filter - 8nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

    View full details
    Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD
  • Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD

    Chroma OIII Filter Optimized for f/3 - 3nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

    View full details
    Original price $575.00 USD - Original price $1,550.00 USD
    Original price
    $575.00 USD - $1,550.00 USD
    $575.00 USD - $1,550.00 USD
    Current price $575.00 USD
  • Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD

    Chroma OIII Filter Optimized for f/3 - 5nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

    View full details
    Original price $460.00 USD - Original price $1,380.00 USD
    Original price
    $460.00 USD - $1,380.00 USD
    $460.00 USD - $1,380.00 USD
    Current price $460.00 USD
  • Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD

    Chroma OIII Filter Optimized for f/3 - 8nm

    Options available

    Chroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when...

    View full details
    Original price $275.00 USD - Original price $830.00 USD
    Original price
    $275.00 USD - $830.00 USD
    $275.00 USD - $830.00 USD
    Current price $275.00 USD