This MRC Circular Polarizer Filter from SmallRig is a 77mm circular polarizer designed to eliminate reflections from nonmetallic surfaces such as water and glass and increase saturation while retaining vivid color of photographs or videos. Made from high clarity, high-transmission SCHOTT B270 optical glass, the filter is precisely ground and polished for use with lenses of various focal length without compromising image sharpness. It is coated on both sides with 18 layers of multicoating to increase light transmission and reduce reflections and flare. In addition, the filter's resistance coating makes it water resistant, toughened to prevent scratches and abrasions, and easy to clean and care for. The rotating filter ring made from aircraft-grade aluminum alloy, is CNC machined, laser engraved, and anodized for long-term use without wear and tear.