HD GLASS\n• High Density Sharp Cut UV Glass\n• Chemically Enhanced Optical Glass is 4x Stronger\n\nHD COATING\n• 8-layer Anti-Reflective Multi-Coating\n• Water & Oil Repellent, Scratch & Stain Resistant\n\nHD FRAME\n• Wide-Angle Lens Compatible Ultra Thin Frame\n• Glass Mounted with High Pressure Press Technology\n\nA multi-purpose fine-weather filter\nAbsorbs the ultraviolet rays which often makes outdoor photographs hazy and indistinct. A multi-purpose, fine-weather filter for color as well as black and white films. Also serves as a permanent lens protector.