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These filters isolate the Hydrogen Alpha and Oxygen III emission lines while rejecting much of the artificial light produced by street lighting
4FSK digital modulation
the receiver works for 18 hours
high-contrast images even under heavy light pollution or during a full moon
offering long-lasting value and durability for astronomers of all levels
Astronomik H-alpha 6nm CCD MaxFR 50mm – High Contrast for Fast Optics 3x barlow lens These filters isolate the HydrogenAstronomik H alpha 6nm CCD MaxFR 50mm MaxFR Astronomik photographic narrowband emission line filters for fast optical systems. There is an ever growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and Takahashi's Epsilon Astrographs. Our novel MaxFR emission line filters are suitable for very fast focal ratios. The Astronomik MaxFR series of narrowband emission line filters is perfectly matched to the
