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  1. 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,

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

  2. 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

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

    Astrodon - Narrowband - 50mm Square SII 3 nm Filter

    Narrowband FiltersNarrowband (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 ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: SII3-50S
    $1,095.00

  4. 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

  5. Astrodon - Narrowband 5 nm H-a > 90%T 36mm Diameter Filter for SBIG ST-8300

    Astrodon - Narrowband 5 nm H-a > 90%T 36mm Diameter Filter for SBIG ST-8300

    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,

    ...
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    FREE SHIPPING
    (48 States)
    Model#: HA5-36R
    $375.00

  6. 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),

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

  7. Astrodon - Narrowband 5 nm OIII > 90%T 36mm Diameter Filter for SBIG ST-8300

    Astrodon - Narrowband 5 nm OIII > 90%T 36mm Diameter Filter for SBIG ST-8300

    Astrodon - Narrowband 5 nm OIII 90%T 36mm Diameter Filter for SBIG ST8300

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    FREE SHIPPING
    (48 States)
    Model#: OIII5-36R
    $375.00

  8. Astrodon - Narrowband 5 nm SII > 90%T 36mm Diameter Filter for SBIG ST-8300

    Astrodon - Narrowband 5 nm SII > 90%T 36mm Diameter Filter for SBIG ST-8300

    Astrodon - Narrowband 5 nm SII 90%T 36mm Diameter Filter for SBIG ST8300

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    (48 States)
    Model#: SII5-36R
    $375.00

  9. Astrodon - NIR Tricolor - 1.25" Mounted NIR Luminance >700 nm

    Astrodon - NIR Tricolor - 1.25" Mounted NIR Luminance >700 nm

    NIR Tricolor Filters        The NIR region remains largely unexplored by amateur imagers. Perhaps this is due to the impression that the Si CCD camera is not sufficiently sensitive in the NIR ... Learn More
    Model#: NIRL-27R
    $175.00

  10. Astrodon - NIR Tricolor - 1.25" Mounted NIRL123 Tri-color Imaging (Set of 4)

    Astrodon - NIR Tricolor - 1.25" Mounted NIRL123 Tri-color Imaging (Set of 4)

    NIR Tricolor Filters        The NIR region remains largely unexplored by amateur imagers. Perhaps this is due to the impression that the Si CCD camera is not sufficiently sensitive in the NIR ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: NIRL123-27R
    $500.00

  11. Astrodon - NIR Tricolor - 50mm dia. NIRL Luminance

    Astrodon - NIR Tricolor - 50mm dia. NIRL Luminance

    NIR Tricolor Filters        The NIR region remains largely unexplored by amateur imagers. Perhaps this is due to the impression that the Si CCD camera is not sufficiently sensitive in the NIR ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: NIRL-50R
    $295.00

  12. Astrodon - NIR Tricolor - 50mm dia. NIRL123 Tri-color Imaging (Set of 4)

    Astrodon - NIR Tricolor - 50mm dia. NIRL123 Tri-color Imaging (Set of 4)

    NIR Tricolor Filters        The NIR region remains largely unexplored by amateur imagers. Perhaps this is due to the impression that the Si CCD camera is not sufficiently sensitive in the NIR ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: NIRL123-50R
    $1,150.00

  13. Astrodon - Tru-Balance E-Series + 5 nm > 90%T H-a 65mm Square LRGB Filters for SBIG STX

    Astrodon - Tru-Balance E-Series + 5 nm > 90%T H-a 65mm Square LRGB Filters for SBIG STX

    The E-Series is designed for the red-sensitive Kodak full-frame detectors with the goal of equalizing the fluxes, and hence, the signal-to-noise, for the red, green and blue filters.  This simplifies your imaging, because it allows you to take the same length exposure for each color and only one dark frame exposure time.  You will appreciate this since each 16803 FITS file is ~32MB in size.  Within ~10% your color combine weights based upon a G2V (sun-like) star white point should be 1:1:1, making processing much easier.

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    (48 States)
    Model#: LRGB2HA5_65S
    $2,750.00

  14. Astrodon - Tru-Balance E-Series - 1.25" Generation 2 Mounted GREEN Filter

    Astrodon - Tru-Balance E-Series - 1.25" Generation 2 Mounted GREEN 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
    Model#: G2-E27R
    $125.00

  15. Astrodon - Tru-Balance E-Series - 1.25" Mounted CRGB Filter

    Astrodon - Tru-Balance E-Series - 1.25" Mounted 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-E27R
    $450.00

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

    Astrodon - Tru-Balance E-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-E50R
    $875.00

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

    Astrodon - Tru-Balance E-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-E50R
    $875.00

  18. Astrodon - Tru-Balance E-Series - 50mm Square CRGB Filter

    Astrodon - Tru-Balance E-Series - 50mm Square CRGB Filter

    What really distinguishes E-Series Tru-Balance filters is their ability to regulate the transition of photons. Within 10%, the RGB color combine weights are about 1:1:1 which means the observor must only take one dark for equal time multiple expores for RGB.

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    FREE SHIPPING
    (48 States)
    Model#: CRGB2-E50S
    $1,150.00

  19. Astrodon - Tru-Balance E-Series - 50mm Square Generation 2 GREEN Filter

    Astrodon - Tru-Balance E-Series - 50mm Square Generation 2 GREEN 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#: G2-E50S
    $300.00

  20. Astrodon - Tru-Balance E-Series - 50mm Square LRGB Filter

    Astrodon - Tru-Balance E-Series - 50mm Square 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-E50S
    $1,150.00

Items 61 to 80 of 740 total

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