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  • Chroma H-alpha filter, 5nm FWHM

    $460.00$1,195.00
    • H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen.
    • At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm).
    • Parfocal for systems f/4.0 or slower
    • Transmitted wavefront better than 0.25 waves/inch
    • Parallelism: less than 30 arcsec
    • Made in the U.S.A.
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  • Chroma LRGB filter set, Luminance, Red, Green, Blue

    $125.00$2,595.00
    • 2″ Luminance, Red, Green, and Blue filter set
    • Parfocal for systems f/4.0 or slower
    • Made in America
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  • Chroma OIII filter, 5nm FWHM

    $460.00$1,195.00
    • H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen.
    • At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm).
    • Parfocal for systems f/4.0 or slower
    • Transmitted wavefront better than 0.25 waves/inch
    • Parallelism: less than 30 arcsec
    • Made in the U.S.A.
    Select options
  • Chroma SII filter, 5nm FWHM

    $460.00$1,195.00
    • SII filters isolate the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm).
    • Parfocal for systems f/4.0 or slower
    • Transmitted wavefront better than 0.25 waves/inch
    • Parallelism: less than 30 arcsec
    • Made in the U.S.A.
    Select options