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31 channels
which makes the image sharper and clearer
and can also be used for observing brighter deep-sky objects under favourable conditions
nearly all emission line photons reach the sensor
With Astronomik narrowband filters
Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for Sony Alpha 7 Brass Screw Clamp 31 channelsAstronomik 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
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