Marumi Digital High Grade filters have been specially designed with Digital Photography in mind. Each filter uses a specially developed ultra-low reflection coating to minimize internal reflection off the cameras built-in CCD & CMOS Sensors. Other anti-reflect features include a special slim frame with satin smooth finish & a black ink process on the glass edge to eliminate flare. Neutral density filter to reduce light volume, allowing the photographer to use slower shutter speeds under bright conditions, giving more control & creativity.