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50mm Filters

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  1. Custom Scientific "U" Standard Grade Filter 50mm Round Unmountable

    Custom Scientific - "U" Standard Grade Filter - 50mm Round Unmountable

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

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    FREE SHIPPING
    (48 States)
    Model#: CU-50U
    $295.00

  2. 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.

  3. 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.

  4. Custom Scientific Luminance (IR-Blocked Clear) Filter - 50mm Round Unmounted

    Custom Scientific - Luminance (IR-Blocked Clear) Filter - 50mm Round Unmounted

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

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    Model#: CU-LUM-50
    $150.00

  5. Custom Scientific Luminance (IR-Blocked Clear) Filter 50mm x 50mm Square

    Custom Scientific - Luminance (IR-Blocked Clear) Filter - 50mm x 50mm Square

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

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    Model#: CU-LUM-50S
    $195.00

  6. Baader Planetarium - Baader UHC-S Nebula Filter 50.4mm Square, L-Booster

    Baader Planetarium - Baader UHC-S Nebula Filter 50.4mm Square, L-Booster

    The Baader Planetarium UHC-S Nebula filter excels at delivering a high-contrast and natural view of emission nebula - without excessive dimming and loss of background star fields.

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    (48 States)
    Model#: FUHC-SQ50
    $226.00

  7. Astronomik - CLS Visual Light Pollution Filter - 50mm Round Unmounted

    Astronomik - CLS Visual Light Pollution Filter - 50mm Round Unmounted

    The Astronomik Visual CLS is a light pollution filter for black & white and color imaging of nebulae, galaxies and star clusters.

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    Model#: CLS-50R
    $189.95

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

    Astrodon - Narrowband - 50mm Unmounted OIII 5 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, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: OIII5-50S
    $875.00

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

    Astrodon - Narrowband - 50mm Unmounted SII 5 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, 501 nm), sulfur (SII, 672nm) and others.

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

  10. Astrodon - Narrowband - 50mm Unmounted Red Continuum 5 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted Red Continuum 5 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, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: REDCON5-50S
    $875.00

  11. Astrodon Narrowband 50mm Unmounted H-a 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 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#: HA3-50S
    $1,250.00

  12. Astrodon - Narrowband - 50mm Unmounted OIII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted OIII 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#: OIII3-50S
    $1,250.00

  13. 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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    (48 States)
    Model#: NII3-50R
    $995.00

  14. Astronomik - H-Alpha 6nm CCD Filter - 50mm Round Unmounted

    Astronomik - H-Alpha 6nm CCD Filter - 50mm 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#: HA6-50R
    $499.95

  15. Astronomik - H-Alpha 12nm CCD Filter - 50mm Round Unmounted

    Astronomik - H-Alpha 12nm CCD Filter - 50mm Round Unmounted

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

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    (48 States)
    Model#: HA12-50R
    $329.95

  16. Astronomik - H-Alpha 6nm CCD Filter - 50mm Square Unmounted

    Astronomik - H-Alpha 6nm CCD Filter - 50mm Square Unmounted

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

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    (48 States)
    Model#: HA6-50SQ
    $649.95

  17. Astrodon - Narrowband - 50mm Unmounted H-Alpha 5 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 5 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, 501 nm), sulfur (SII, 672nm) and others.

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

  18. Astrodon - Narrowband - 50mm Unmounted OIII 3nm Filter

    Astrodon - Narrowband - 50mm Unmounted OIII 3nm 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#: SII3-50R
    $995.00

  19. Astrodon - Narrowband - 50mm Unmounted OIII 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted OIII 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#: OIII3-50R
    $995.00

  20. Astrodon Photometric UVBRIc 50mm Unmounted Ic Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted Ic Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.  H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

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    (48 States)
    Model#: Ic*-50R
    $400.00

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