Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for EOS XL Cameras astrophotography camera so you do not need

so you do not need to worry battery power loss

400 mah battery

the filters do not degrade over time

1 x BL-5C Li-ion battery

Astronomik UHC filters’ astounding high light transmission brings better views of deep-sky-objects even to small telescopes

Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for EOS XL Cameras astrophotography camera so you do not needAstronomik H alpha 6nm CCD MaxFR Clip Filter EOS XL 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 the Epsilon Astrographs made by Takahashi. Our novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband emission line filters is