Astronomik SII 12nm CCD MaxFR 2'' (M48) Filter for Fast Optical Systems refractor telescope diagonal looking at the photons of

looking at the photons of other wavelengths that we do NOT want to record makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor

cycling or sports

max up to 300M in the open area

hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM)

the distance will be shortened indoors by obstacles

Astronomik SII 12nm CCD MaxFR 2'' (M48) Filter for Fast Optical Systems refractor telescope diagonal looking at the photons ofAstronomik SII 12nm CCD MaxFR 2'' (M48) MaxFR Astronomik photographic narrowband emissionline filters for fast optical systems. There is an ever growing demand for filters suitable for extremly 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 perfect matched to