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50mm Filters

Items 41 to 60 of 91 total

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  1. 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.

    Out of stock

  2. 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.

    Out of stock

  3. 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

  4. 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

  5. Astronomik 6 nm OIII MFR Narrowband Filter - 50mm Round Unmounted

    Astronomik - 6 nm OIII MFR Narrowband Filter - 50mm Round Unmounted

    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#: OIIICCD6-50R
    $449.95

  6. Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick ;Blocks blue completely and ... Learn More
    Model#: 17233
    $30.00

  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
    $159.95

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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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    FREE SHIPPING
    (48 States)
    Model#: HA6-50R
    $449.95

  16. 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
    $289.95

  17. 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

  18. 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

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

    Astrodon - Photometric UVBRIc - Johnson-Cousins 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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    FREE SHIPPING
    (48 States)
    Model#: Ic*-50R
    $400.00

  20. 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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    FREE SHIPPING
    (48 States)
    Model#: SII3-50S
    $1,250.00

Items 41 to 60 of 91 total

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