The Hoya HD(0) UV filter cuts off unwanted ultraviolet rays, reduces haze and increases clarity. In addition, the UV filter serves very well as protective glass for the lens. The filter has ultra-clear, highly transparent UV-cut glass, which has been chemically improved and is 4x stronger than regular protective glass. The HD coating consists of 16 layers on both sides, as well as an anti-reflective multi-layer coating. The filter is also water and oil repellent, scratch and dirt repellent. The ultra-thin HD frame makes the filter compatible with wide-angle lenses. The frame was mounted around the glass using a high-pressure pressing technique.
