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    Orion 5582 2-Inch Oxygen-III Nebula Eyepiece Filter image 1

    Orion 5582 2-Inch Oxygen-III Nebula Eyepiece Filter

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    Orion
    Orion
    From the Manufacturer An Oxygen-III, or O-III, eyepiece filter helps reveal details and improve contrast when viewing nebulas through a telescope. Filter transmits close to 90% of the light corresponding to two oxygen-III spectral lines at 496nm and 501nm wavelengths. O-III eyepiece filter blocks virtually all other visible wavelengths of light for optimized nebula-viewing performance. Made with high quality optical glass in a double-threaded, metal filter cell. Recommended for use with telescopes of 8" aperture or greater and for visual use only
    • An Oxygen-III, or O-III, eyepiece filter helps reveal details and improve contrast when viewing nebulas through a telescope
    • Filter transmits close to 90% of the light corresponding to two oxygen-III spectral lines at 496nm and 501nm wavelengths
    • O-III eyepiece filter blocks virtually all other visible wavelengths of light for optimized nebula-viewing performance
    • Made with high quality optical glass in a double-threaded, metal filter cell
    • Recommended for use with telescopes of 8" aperture or greater and for visual use only