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  1. Continuum Filters (2)
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  7. Optec 50mm Diameter Round Filters for IFW Filter Wheels - unmounted (1)

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  1. Astrodon - LRGB Astrodon Tru-Balance E-Series Filters 36 mm dia.for SBIG ST-8300

    Astrodon - LRGB Astrodon Tru-Balance E-Series Filters 36 mm dia.for SBIG ST-8300

    Astrodon Tru-Balance filters simply stack and merge the color images through the filters on top of the brightness of a monochrome image from the sensor. This is a primary reason why monochrome sensors are so beneficial.

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: LRGB2-E36R
    $595.00

  2. Astrodon - Narrowband - 36mm Unmounted H-a 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted H-a 3 nm Filter

    Narrowband 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,

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA3-36R
    $565.00

  3. Astrodon - Narrowband - 50mm dia. H-a 3 nm Filter

    Astrodon - Narrowband - 50mm dia. H-a 3 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA3-50R
    $925.00

  4. Astrodon - Narrowband - 50mm dia. H-a 5 nm Filter

    Astrodon - Narrowband - 50mm dia. H-a 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA5-50R
    $625.00

  5. Astrodon - Narrowband - 50mm dia. OIII 3 nm Filter

    Astrodon - Narrowband - 50mm dia. OIII 3 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: OIII3-50R
    $925.00

  6. Astrodon - Narrowband - 50mm dia. OIII 5 nm Filter

    Astrodon - Narrowband - 50mm dia. OIII 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: OIII5-50R
    $625.00

  7. Astrodon - Narrowband - 50mm dia. RED 5 nm Filter

    Astrodon - Narrowband - 50mm dia. RED 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: REDCON5-50R
    $675.00

  8. Astrodon - Narrowband - 50mm dia. SII 3 nm Filter

    Astrodon - Narrowband - 50mm dia. SII 3 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: SII3-50R
    $925.00

  9. Astrodon - Narrowband - 50mm dia. SII 5 nm Filter

    Astrodon - Narrowband - 50mm dia. SII 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: SII5-50R
    $625.00

  10. Astrodon - Narrowband - 50mm dia. Unmounted NII 3 nm Filter

    Astrodon - Narrowband - 50mm dia. Unmounted NII 3 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: NII3-50R
    $925.00

  11. Astrodon - Narrowband - 50mm Square H-a 5 nm Filter

    Astrodon - Narrowband - 50mm Square H-a 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA5-50S
    $745.00

  12. Astrodon - Narrowband - 50mm Square OIII 5 nm Filter

    Astrodon - Narrowband - 50mm Square OIII 5 nm Filter

    Narrowband 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,

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: OIII5-50S
    $745.00

  13. Astrodon - Narrowband - 50mm Square RED Continuum 5 nm Filter

    Astrodon - Narrowband - 50mm Square RED Continuum 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: REDCON5-50S
    $750.00

  14. Astrodon - Narrowband - 50mm Square SII 5 nm Filter

    Astrodon - Narrowband - 50mm Square SII 5 nm Filter

    Narrowband 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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: SII5-50S
    $745.00

  15. Astrodon - Narrowband 5 nm H-a > 90%T 65mm Square Filter for SBIG STX

    Astrodon - Narrowband 5 nm H-a > 90%T 65mm Square Filter for SBIG STX

    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
    FREE SHIPPING
    (48 States)
    Model#: HA5-65S
    $945.00

  16. Astrodon - Tru-Balance I-Series - 50mm dia. CRGB Filter

    Astrodon - Tru-Balance I-Series - 50mm dia. CRGB Filter

    TRU-BALANCE FILTERSSIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!  Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CRGB2-I50R
    $875.00

  17. Astrodon - Tru-Balance I-Series - 50mm dia. LRGB Filter

    Astrodon - Tru-Balance I-Series - 50mm dia. LRGB Filter

    TRU-BALANCE FILTERSSIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!  Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: LRGB2-I50R
    $875.00

  18. 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.

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA6-50SQ
    $649.95

  19. Astronomik - H-Alpha CCD Filter 6nm - 2" Mounted

    Astronomik - H-Alpha CCD Filter 6nm - 2" Mounted

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

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA6-2
    $529.95

  20. Astronomik - LRGB Filter Set - 2" Round Mounted

    Astronomik - LRGB Filter Set - 2" Round Mounted

    These filters provide a natural color reproduction of planets, stars, emission- and reflection nebulas.

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: LRGB-2
    $599.95

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