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  1. Astrodon - Narrowband - 50mm Unmounted H-Alpha 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 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#: HA3-50R
    $995.00

  2. 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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    (48 States)
    Model#: OIII3-50R
    $995.00

  3. 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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    (48 States)
    Model#: SII3-50R
    $995.00

  4. 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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    (48 States)
    Model#: HA5-50S
    $875.00

  5. 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

  6. 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

  7. Astrodon - Photometric Sloan - 1.25 " Mounted u Filter

    Astrodon - Photometric Sloan - 1.25 " Mounted u Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    Model#: u-27R
    $175.00

  8. Astrodon - Photometric Sloan - 50mm dia. Unmounted u Filter

    Astrodon - Photometric Sloan - 50mm dia. Unmounted u Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: U-50R
    $320.00

  9. Astrodon - Photometric Sloan - 50mm square Unmounted u Filter

    Astrodon - Photometric Sloan - 50mm square Unmounted u Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: U-50S
    $360.00

  10. Astrodon - Photometric Sloan - 1.25 " Mounted g Filter

    Astrodon - Photometric Sloan - 1.25 " Mounted g Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    Model#: g-27R
    $150.00

  11. Astrodon - Photometric Sloan - 50mm dia. Unmounted g Filter

    Astrodon - Photometric Sloan - 50mm dia. Unmounted g Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: G-50R
    $320.00

  12. Astrodon - Photometric Sloan - 50mm square Unmounted g Filter

    Astrodon - Photometric Sloan - 50mm square Unmounted g Filter

    Astrodon Photometrics - Sloan FiltersThe Sloan Digital Sky Survey (SDSS) filters were  designed by Fukugita et al. (Ast. J., 411/4, April 1996, p ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: G-50S
    $390.00

  13. 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

  14. 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),

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA3-50S
    $1,250.00

  15. 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),

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: OIII3-50S
    $1,250.00

  16. Astrodon - Narrowband - 1.25" Mounted Red Continuum 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted Red Continuum 5 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, 501 nm), sulfur (SII, 672nm) and others.

    ...
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    FREE SHIPPING
    (48 States)
    Model#: REDCON5-27R
    $330.00

  17. Astrodon - Narrowband - 1.25" Mounted NII 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted 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#: NII3-27R
    $490.00

  18. 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),

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: NII3-50R
    $995.00

  19. Astrodon NIR Tricolor 1.25" Mounted NIR Luminance >700 nm

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

    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.

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    Model#: NIRL-27R
    $195.00

  20. Astrodon - NIR Tricolor - 50mm NIRL Luminance Filter

    Astrodon - NIR Tricolor - 50mm NIRL Luminance Filter

    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
    $335.00

Items 121 to 140 of 5858 total

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