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NII (Nitrogen) Filters

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  1. Astrodon - Narrowband - 1.25" Mounted NII 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted NII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    FREE SHIPPING
    (48 States)
    Model#: NII3-27R
    $490.00

  2. Planetarium Baader 36mm Narrowband Filter Set - Ha, OIII & SII

    Baader Planetarium- Baader 36mm Narrowband Filter Set - Ha, OIII, SII

    Baader Planetarium- Baader 36mm Narrowband Filter Set - Ha, OIII, SII ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: BA-36NBSET
    $495.00

  3. Astrodon - Narrowband - 50mm Unmounted NII 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted NII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

    ...
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    FREE SHIPPING
    (48 States)
    Model#: NII3-50R
    $995.00

  4. Astrodon Narrowband 50mm Unmounted NII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted NII 3 nm Square Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

    ...
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    FREE SHIPPING
    (48 States)
    Model#: NII3-50S
    $1,250.00

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