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an H-alpha is the best choice for all nebulae glowing red
If you want to put your type of sticker
Blocking of unwanted wavelengths for clearer views
optimized for maximum photon counts on CCD sensors
Surface Quality: 60/40
Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for Sony Alpha 7 dielectric diagonal an H-alpha is the bestAstronomik H alpha 6nm CCD MaxFR Clip Filter Sony alpha 7 MaxFR Astronomik photographic narrowband emissionline filters for fast optical systems. There is an ever growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi. Our novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband emissionline filters is
