HELIOPAN gray filter ND 0.3 (-1 aperture), neutral density filter in the product nameND 0.3/-1 aperture reduces the amount of light captured by the lensThe color character is not affected, color representation remains unchangedHeliopan gray filters are made of Schott glassCompatibility according to title: Hasselblad Baj.CF 60/HProduct category: Gray filter / neutral density filter (ND 0.3) for light reduction