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SII (Sulfur) Filters

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

    Astrodon - Narrowband - 1.25" Mounted SII 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#: SII3-27R
    $490.00

  2. Astrodon Narrowband 1.25" Mounted SII 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted SII 5 nm Filter

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    (48 States)
    Model#: SII5-27R
    $330.00

  3. Astrodon - Narrowband - 36mm Unmounted SII 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted SII 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#: SII3-36R
    $650.00

  4. Astrodon Narrowband 36mm Unmounted SII 5 nm Filter

    Astrodon - Narrowband - 36mm Unmounted SII 5 nm Filter

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    (48 States)
    Model#: SII5-36R
    $435.00

  5. Astrodon - Narrowband - 50mm Unmounted SII 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted SII 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#: SII3-50R
    $995.00

  6. Astrodon - Narrowband - 50mm Unmounted SII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted SII 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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    (48 States)
    Model#: SII3-50S
    $1,250.00

  7. Astrodon Narrowband 50mm Unmounted SII 5 nm Filter

    Astrodon - Narrowband - 50mm Unmounted SII 5 nm Filter

    When it comes to Narrowband filters, no one knows more or does it better than Don Goldman of Astrodon Filters. 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, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: SII5-50R
    $725.00

  8. Astrodon Narrowband 50mm Unmounted SII 5 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted SII 5 nm Square Filter

    When it comes to Narrowband filters, no one knows more or does it better than Don Goldman of Astrodon Filters. 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, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: SII5-50S
    $875.00

  9. Astronomik - 6nm OIII MFR Narrowband Filter - 1.25" Mounted

    Astronomik - 6nm OIII MFR Narrowband Filter - 1.25" Mounted

    The OIII line (501 nm) is located in the blue-green portion of the spectrum, making them very suitable for observing most planetary nebulae and supernovae remnants and other objects with doubly ionized oxygen.

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    Model#: OIIICCD6-1
    $199.95

  10. Astronomik 6 nm OIII MFR Narrowband Filter - 2" Mounted

    Astronomik - 6nm OIII MFR Narrowband Filter - 2" Mounted

    The OIII line (501 nm) is located in the blue-green portion of the spectrum, making them very suitable for observing most planetary nebulae and supernovae remnants and other objects with doubly ionized oxygen.

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    (48 States)
    Model#: OIIICCD6-2
    $449.95

  11. Astronomik 6 nm SII MFR Narrowband Filter - 31 mm Round Mounted

    Astronomik - 6nm SII MFR Narrowband Filter - 31mm Round Mounted

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    (48 States)
    Model#: SII6-31
    $249.95

  12. Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

    Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

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

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    Model#: SII-31
    $169.95

  13. Astronomik - SII 12nm CCD Filter - 36mm Round Unmounted

    Astronomik - SII 12nm CCD Filter - 36mm Round Unmounted

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

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    Model#: SII-36
    $189.95

  14. Astronomik SII 12nm CCD Filter - Canon EOS Full Frame Clip

    Astronomik - SII 12nm CCD Filter - Canon EOS Full Frame Clip

    The Astronomik SII-CCD filter is a narrow-band filter for CCD photography. The filter nearly blocks the whole visual spectrum and IR while letting the ionized sulfur lines to pass.

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    (48 States)
    Model#: SII-EOSXL
    $309.95

  15. Baader Planetarium - f/2 Highspeed-Filter S-II 1.25" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter S-II 1.25" (with LPFC)

    Baader’s new ‘High Speed’ Narrowband CCD Filters come in both 1.25” and 2” diameter mounted sizes, in H-alpha, O-III, and S-II, but with an extra twist when compared to their normal filters.

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    (48 States)
    Model#: FSIIHS-1
    $219.00

  16. Baader Planetarium f/2 Highspeed-Filter S-II 2" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter S-II 2" (with LPFC)

    Baader’s new ‘High Speed’ Narrowband CCD Filters come in both 1.25” and 2” diameter mounted sizes, in H-alpha, O-III, and S-II, but with an extra twist when compared to their normal filters.

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    (48 States)
    Model#: FSIIHS-2
    $352.00

  17. FLI - Research Grade - 28mm Diameter SII 3nm

    FLI - Research Grade - 28mm Diameter SII 3nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-SII-3NM
    $485.00

  18. FLI Research Grade 28mm Diameter SII 8nm

    FLI - Research Grade - 28mm Diameter SII 5nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-SII-5NM
    $460.00

  19. FLI - Research Grade - 28mm Diameter SII 8nm

    FLI - Research Grade - 28mm Diameter SII 8nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-SII-8NM
    $275.00

  20. FLI - Research Grade - 50mm Diameter SII 3nm

    FLI - Research Grade - 50mm Diameter SII 3nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-SII-3NM
    $760.00

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