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  1. FLI Research Grade 50mm Square Ha 3nm

    FLI - Research Grade 50mm Square Ha - 3nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-HA3
    $1,250.00

  2. Astronomik - H-Alpha 6nm CCD Filter - 31mm Round Unmounted

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

    The Astronomik 6nm H-alpha filter is an extremely narrow emission-line filter for CCD photography.

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    FREE SHIPPING
    (48 States)
    Model#: HA6-31
    $289.95

  3. Astronomik - H-Alpha 12nm CCD Filter - 36mm Round Unmounted

    Astronomik - H-Alpha 12nm CCD Filter - 36mm Round Unmounted

    The Astronomik H-alpha filter is a narrow band filter for CCD photography.

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    (48 States)
    Model#: HA12-36
    $229.95

  4. Astronomik - H-Alpha 12nm CCD Filter - 31mm Round Unmounted

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

    The Astronomik H-alpha filter is a narrow band filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive.

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    Model#: HA12-31
    $179.95

  5. Astrodon - Narrowband - 36mm Unmounted H-Alpha 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted H-Alpha 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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    (48 States)
    Model#: HA3-36R
    $650.00

  6. Opticstar - 1.25" Infra-Red Cut-Off Imaging Filter

    Opticstar - 1.25" Infra-Red Cut-Off Imaging Filter

    For the use in CCD imaging this high-transmission filter will exclude any IR wavelengths beyond H-alpha showing a very steep desirable curve.

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    Model#: OSRIFIR

    Regular Price: $45.00

    Special Price: $42.75

  7. Opticstar - 2" Nebula Deep Sky Filter

    Opticstar - 2" Nebula Deep Sky Filter

    This Opticstar 2" eyepiece is suitable for both visual observation and imaging these are all-in-one high-transmission deep sky filters.

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    Model#: OSRIFNEB2

    Regular Price: $105.00

    Special Price: $99.75

  8. Orion - 2" Extra-Narrowband Hydrogen Alpha Filter

    Orion - 2" Extra-Narrowband Hydrogen Alpha Filter

    Filter for astrophotography transmits 90% of light at 656.3nm wavelength (H-alpha).

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    Model#: 05547
    $359.95

  9. 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
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    (48 States)
    Model#: BA-36NBSET
    $495.00

  10. QSI - Astrodon 1.25" Hydrogen-alpha filter 5 nm FWHM

    QSI - Astrodon 1.25" Hydrogen-alpha filter 5 nm FWHM

    Astrodon Hydrogen-Alpha filter with a FWHM of 5nm. For use with internal color filter wheel in QSI 500 Series cameras. This Ha filter is parfocal with Astrodon LRGB Gen2 color filters ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: FL1-AD-HA5
    $275.00

  11. Astronomik - H-Alpha 6nm CCD Filter - 36mm Round Unmounted

    Astronomik - H-Alpha 6nm CCD Filter - 36mm Round Unmounted

    The Astronomik 6nm H-alpha filter is an extremely narrow emission-line filter for CCD photography.

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    (48 States)
    Model#: HA6-36
    $349.95

  12. Chroma filters

    Chroma Technology - Ha/8-27mm Diameter Filter - Mounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    (48 States)
    Model#: Ha/8-27M
    $265.00

  13. FLI Research Grade 50mm Square Ha 8nm

    FLI - Research Grade 50mm Square Ha - 5nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    FREE SHIPPING
    (48 States)
    Model#: RG-50S-HA5
    $875.00

  14. Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 50mm x 50mm Square

    Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 50mm x 50mm Square

    The Custom Scientific H-Alpha 656.3/4.5 nanometer filter is a great accessory for imaging emission nebulae which emit large amounts of the H-Alpha spectral line at a 4.5 nanometer bandpass due to excited hydrogen atoms.

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    Model#: CU-HA45NM-50S
    Call for pricing.

  15. Custom Scientific H-Alpha 656.3/4.5 nm Filter 50mm Round Unmounted

    Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 50mm Round Unmounted

    The Custom Scientific H-Alpha 656.3/4.5 nanometer filter is a great accessory for imaging emission nebulae which emit large amounts of the H-Alpha spectral line at a 4.5 nanometer bandpass due to excited hydrogen atoms.

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    Model#: CU-HA45NM-50
    Call for pricing.

  16. Custom Scientific H-Alpha 656.3/4.5 nm Filter 1.25" Round Mounted

    Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 1.25" Round Mounted

    The Custom Scientific H-Alpha 656.3/4.5 nanometer filter is a great accessory for imaging emission nebulae which emit large amounts of the H-Alpha spectral line at a 4.5 nanometer bandpass due to excited hydrogen atoms.

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    FREE SHIPPING
    (48 States)
    Model#: CU-HA45NM-125
    $600.00

  17. Chroma filters

    Chroma Technology - Ha/8-65mm x 65mm Diameter Filter - Square

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    FREE SHIPPING
    (48 States)
    Model#: Ha/8-65S
    $915.00

  18. Chroma filters

    Chroma Technology - Ha/8-50mm x 50mm Diameter Filter - Square

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    (48 States)
    Model#: Ha/8-50S
    $465.00

  19. Chroma filters

    Chroma Technology - Ha/8-50mm Diameter Filter - Unmounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    FREE SHIPPING
    (48 States)
    Model#: Ha/8-50
    $455.00

  20. Chroma filters

    Chroma Technology - Ha/8-36mm Diameter Filter - Unmounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    FREE SHIPPING
    (48 States)
    Model#: Ha/8-36
    $355.00

Items 1 to 20 of 45 total

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