This ultra-slim UV filter offers extraordinary light transmission thanks to the high quality optical glass and multi-layer antireflective coating. It's additional waterproof NANO coating helps keeping the glass surface free of stains and water droplets. Irix UV filter also provide decent protection of the front lens under extreme circumstances. Irix UV filter has been designed especially for Irix 15/2.4 lens. It's low-profile frame and knurled edges provide very good grip and functionality with aesthetic design which harmonizes with all Irix products. The glass surfaces of Irix filters are covered by multi-coated antireflection layer that keeps the image clear and full of natural colors. The additional waterproof coating helps keeping the glass surface free of water droplets under rainy weather.