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SII (Sulfur) Filters

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  1. QSI - Astrodon 1.25" SII filter 3 nm FWHM

    QSI - Astrodon 1.25" SII filter 3 nm FWHM

    Astrodon Sulfur II filter with a FWHM of 3nm. For use with internal color filter wheel in QSI 500 Series cameras. This Ha filter is parfocal with Astrodon LRGB Gen2 olor filters ... Learn More
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    (48 States)
    Model#: FL1-AD-SII3

    This item is special order. Delivery times will vary. Place your order today and your card will not be charged until the item ships.

    $480.00

  2. 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

    Available

    $725.00

  3. 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

    In Stock

    $875.00

  4. 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

    In Stock

    $490.00

  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

    Available

    $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),

    ...
    Learn More
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    (48 States)
    Model#: SII3-50S

    Available

    $1,250.00

  7. Astrodon Narrowband 1.25" Mounted SII 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted SII 5 nm Filter

    ... Learn More
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    (48 States)
    Model#: SII5-27R

    Available

    $330.00

  8. 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

    Available

    $300.00

  9. 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

    Available

    $460.00

  10. 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

    Available

    $485.00

  11. FLI - Research Grade - 50mm Diameter SII 5nm

    FLI - Research Grade - 50mm 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-50D-SII-5nm

    Available

    $725.00

  12. FLI - Research Grade - 50mm Diameter SII 8nm

    FLI - Research Grade - 50mm 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-50D-SII-8nm

    Available

    $495.00

  13. 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

    Available

    $995.00

  14. FLI - Research Grade 8nm SII Filter - 50mm Square Unmounted

    FLI - Research Grade 8nm SII Filter - 50mm Square Unmounted

    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-50S-SII-8nm

    Available

    $495.00

  15. FLI - Research Grade 5nm SII Filter - 50mm Square Unmounted

    FLI - Research Grade 5nm SII Filter - 50mm Square Unmounted

    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.

    ...
    Learn More
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    (48 States)
    Model#: RG-50S-SII-5nm

    Available

    $875.00

  16. FLI - Research Grade 3nm SII Filter - 50mm Square Unmounted

    FLI - Research Grade 3nm SII Filter - 50mm Square Unmounted

    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-50S-SII-3nm

    Available

    $1,250.00

  17. FLI - Research Grade 8nm SII Filter - 65mm Square Unmounted

    FLI - Research Grade 8nm SII Filter - 65mm Square Unmounted

    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.

    ...
    Learn More
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    (48 States)
    Model#: RG-65S-SII-8nm

    Available

    $915.00

  18. FLI - Research Grade 5nm SII Filter - 65mm Square Unmounted

    FLI - Research Grade 5nm SII Filter - 65mm Square Unmounted

    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-65S-SII-5nm

    Available

    $1,195.00

  19. Astrodon Narrowband 36mm Unmounted SII 5 nm Filter

    Astrodon - Narrowband - 36mm Unmounted SII 5 nm Filter

    ... Learn More
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    (48 States)
    Model#: SII5-36R

    Available

    $435.00

  20. Optolong SII 6.5nm Filter - EOS APS C Clip

    Optolong - SII 6.5nm Filter - EOS APS C Clip

    The Optolong Sulfur II 6.5nm Extra Narrowband Filter transmits a 6.5nm bandwidth of light that is centered at 672nm and tremendously decreases different transmissions, including wavelengths of light that cause light pollution (both artificial and natural).

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    (48 States)
    Model#: EOSAPS-SII65

    Available

    $239.00

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