Overview The ProMaster Digital HD UV Filteris an extremely high quality UV filter designed to protect your lens and to filter excess ultraviolet light. Constructed with premium Schott optical glass and 12 layers of anti-relective coating, these filters are designed to yield extreme image sharpness. They also feature a precision machined, super slim aluminum frame with anti-reflective matte finish and knurled edges. In the Box Promaster UV Digital HD Filter | 46mm