Ultra thin 1mm glass, Multi-Coated glass. * Pro Multi-Coated. Pro Digital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflections. * Black Almite Frame Filters feature a black matte. Black Rimmed Glass. These filters are equipped with black rimmed glass to reduce the ghost. * Low Profile Frame Ultra thin filter frames (3MM) to help avoid vignetting on super wide angle lenses are also designed to hold. * Knurling Edge Frame . These filters are equipped with a straight knurling edge for non-slip, easy attachment and removal.