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50mm Filters

Items 21 to 40 of 91 total

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  1. Chroma filters

    Chroma Technology - Luminance 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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    (48 States)
    Model#: Lum-50
    $230.00

  2. Astrodon Photometric UVBRIc 50mm Unmounted Rc Edge Blackened Square Filter

    Astrodon - Photometric UVBRIc - Johnson-Cousins 50mm Unmounted Rc Edge Blackened Square 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#: Rc*-50S
    $440.00

  3. Astrodon Narrowband 50mm Unmounted NII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted NII 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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    Model#: NII3-50S
    $1,250.00

  4. IDAS - Hutech - 50mm Unmounted LPS Filter

    IDAS - Hutech - 50mm Unmounted LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    Model#: LPS-P2-50
    $189.00

  5. Baader Planetarium - H-Alpha 35nm CCD Filter, 50.4 x 3mm Round

    Baader Planetarium - H-Alpha 35nm CCD Filter, 50.4 x 3mm Round

    Baader's new H-Alpha passfilter enables high-contrast deep sky images of H-II regions (such as the N. American Nebula).

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    (48 States)
    Model#: FHAL-RD50
    $214.00

  6. Baader Planetarium - H-Alpha 35nm CCD Filter 50x50 x 3mm Square

    Baader Planetarium - H-Alpha 35nm CCD Filter 50x50 x 3mm Square

    Baader's new H-Alpha passfilter enables high-contrast deep sky images of H-II regions (such as the N. American Nebula).

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    (48 States)
    Model#: FHAL-SQ50
    $264.00

  7. Baader Planetarium Enforced 3.5nm H-Alpha Filter, 50x50 Square

    Baader Planetarium - Enforced 3.5nm H-Alpha Filter, 50x50 Square

    Baader's New 3.5nm Narrowband Enforced H-alpha Filters  These three sizes of 3.5nm Enforced-Narrowband filters upen up the extremely narrow 3.5nm H-alpha world.

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    (48 States)
    Model#: FHALNE-SQ50
    $640.00

  8. Baader Planetarium - UHC-S Nebula Filter 50.4mm Round, L-Booster

    Baader Planetarium - UHC-S Nebula Filter 50.4mm Round, 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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    Model#: FUHC-RD50
    $184.00

  9. 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

  10. Astronomik - ProPlanet 642 BP IR-Pass Filter - 50mm Round

    Astronomik - ProPlanet 642 BP IR-Pass Filter - 50mm Round

    enhance contrast when used for lunar and planetary imaging, and third it will be a very good and low-priced H-alpha Filter for getting started in Deep-Sky ... Learn More
    Model#: P642-50R
    $129.95

  11. Astronomik - ProPlanet 642 BP IR-Pass Filter - 50mm Square

    Astronomik - ProPlanet 642 BP IR-Pass Filter - 50mm Square

    very good and low-priced H-alpha Filter for getting started in Deep-Sky Astrophotography of H-alpha regions. ... Learn More
    Model#: P642-50SQ
    $159.95

  12. Baader Planetarium 50mm Aperture AstroSolar Binocular Filter

    Baader Planetarium - 50mm Aperture AstroSolar Binocular Filter

    The AstroSolar filter material is mounted onto a plastic ring whereas the plastic ring itself works as stabilizing element for the filter cell by being mounted on a aluminum front frame with a very similar thermal expansion for the plastic and film, thereby reducing the chance of damage.

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    Model#: ASBF-50
    $36.00

  13. Baader Planetarium 50mm Aperture AstroSolar Spotter Filter

    Baader Planetarium - 50mm Aperture AstroSolar Spotter Filter

    The AstroSolar Filters for spotters are very stable filters that can work with spotting scopes, tele-lenses and even amateur telescopes (corresponding to the size of filter chosen).

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    Model#: ASSF-50
    $37.00

  14. Custom Scientific - UBVRI 50mm Square Filter Set

    Custom Scientific - UBVRI 50mm Square Filter Set

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

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    (48 States)
    Model#: CU-UBVRI50S-SET
    $2,500.00

  15. Custom Scientific UBVRI 50mm Unmounted Round Filter Set

    Custom Scientific - UBVRI 50mm Unmounted Round Filter Set

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

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    (48 States)
    Model#: CU-UBVRI50-SET
    $1,475.00

  16. Custom Scientific "B" Standard Grade Blue Filter 50mm Round Unmounted

    Custom Scientific - "B" Standard Grade Blue Filter - 50mm Round Unmounted

    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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    (48 States)
    Model#: CU-50B
    $295.00

  17. Custom Scientific - "I" Standard Grade IR Filter - 50mm Round Unmounted

    Custom Scientific - "I" Standard Grade IR Filter - 50mm Round Unmounted

    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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    (48 States)
    Model#: CU-50I
    $295.00

  18. Custom Scientific "V" Standard Grade Filter 50mm Round Unmounted

    Custom Scientific - "V" Standard Grade Filter - 50mm Round Unmounted

    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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    (48 States)
    Model#: CU-50V
    $295.00

  19. Custom Scientific "R" Standard Grade Red Filter 50mm Round Unmounted

    Custom Scientific - "R" Standard Grade Red Filter - 50mm Round Unmounted

    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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    (48 States)
    Model#: CU-50R
    $295.00

  20. 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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    (48 States)
    Model#: CU-50U
    $295.00

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