NEW 800% harder ultra-smooth nano-coating is scratch resistant and easier to clean and maintain NEW 32-layer proprietary coating system reduces reflections, flares and ghosting Chemically enhanced optical glass is 4X stronger than competitor's NEW coating technology yields 99.7% light transmission, and is scratch and stain resistant, water and oil repellent Ultra thin frame for use with wide-angle lenses results in no vignetting One-piece frame, glass mounted with high pressure press technology ensures filter will never come apart Exclusive Chemically Hardened UV Optical glass, 4x stronger than normal optical glass