Developed to exceed the sharpness needs of 50-megapixel cameras entering the market, the Hoya HD3 UV (Ultraviolet) camera filter sports a new and improved 32-layer ultra-smooth, ultra-hard, nano-coating that is 5x sharper and 800% harder than the Hoya HD2 UV. Combined with the exclusive chemically enhanced Hoya optical UV glass which is 4X harder than traditional optical glass the new Hoya HD3 UV lives up to "Hoya Tough" and is the NEW "Toughest Filter on the Plane Developed to exceed the sharpness needs of 50-megapixel cameras entering the market, the Hoya HD3 UV (Ultraviolet) camera filter sports a new and improved 32-layer ultra-smooth, ultra-hard, nano-coating that is 5x sharper and 800% harder than the Hoya HD2 UV. Combined with the exclusive chemically enhanced Hoya optical UV glass which is 4X harder than traditional optical glass the new Hoya HD3 UV lives up to Hoya Tough and is the NEW Toughest Filter on the Planet. Utilizing a new multi-coating process that applies 32-layers of anti-reflective coating to the optical UV glass, Hoya created a filter that is 5x sharper and a coating that is 800% harder than the award winning HD2 UV filter. The HD3 filter yields a light transmission rate of 99.7% and uses the same chemically enhanced 4x harder optical UV glass that made the HD2 filters The Toughest Filters on the Planet. The new coating process created a top layer that is more scratch & stain resistant, and water & oil repellant making it super easy to clean when smudges and fingerprints are introduced to the surface. The filters UV properties filter unwanted ultra-violet rays, reducing haze and increasing clarity. This means the filter faithfully maintains the sharpness and clarity of the original lens while protecting from everyday wear-and-tear and extreme shooting conditions.