Astrodon Filters

OPT is your source for the highest performing research-grade photometric (UVBRI, Sloan, and Exoplanet) filters. For astrophotography, Astrodon has developed LRGB filters that are specifically matched to interline and full-frame architecture CCD sensors to give the best color accuracy. Astrodon offers some of the narrowest  H-alpha, SII and OII narrowband telescope filters with bandpasses as short as 3 nanometers!

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OPT is your source for the highest performing research-grade photometric (UVBRI, Sloan, and Exoplanet) filters. For astrophotography, Astrodon has developed LRGB filters that are specifically matched to interline and full-frame architecture CCD sensors to give the best color accuracy. Astrodon offers some of the narrowest  H-alpha, SII and OII narrowband telescope filters with bandpasses as short as 3 nanometers!

ALL Astrodon filters are made from single substrates of high quality fused silica of the same 3 mm thickness to minimize or eliminate the need for significant refocusing.