Hoya 82mm HD3 32-Layer Nano Multi-Coated UV Filter Description Utilizing a new patented HMC nano-coating process that applies 32-layers of anti-reflective (AR) coating to its optical ultra-violet (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 easy to clean when smudges and fingerprints are introduced to the surface. 4x Harder Optical Glass than traditional filter glass Re-Certified Resolution for 100mp+ Cameras 800% harder surface resists scratching and abrasions Patented Ultra-hard Nano-coating process Superior Resolution and Sharpness Waterproof and Stain-resistant top coat makes it easy to clean Lifetime Limited Warranty Features: NEW and IMPROVED ultra-smooth nano-coating is 800% harder for ultimate protection and cleaning NEW 32-Layer Ultra-Hard Nano Multi-Coating process creates the sharpest consumer UV filter available Chemically enhanced UV optical glass is 4x stronger than normal optical glass NEW Multi-coating technology yields 99.7% light transmission and is extremely scratch & stain resistant and water & oil repellent Lifetime Limited Warranty when purchased from a USA Authorized Retailer Product Details: Brand: Hoya Material: Optical Glass Photo Filter Thread Size: 82 Millimeters Coating Description: Nano Coating Photo Filter Effect Type: Ultraviolet Water Resistance Level: Not Water Resistant Product Dimensions: 3.23"L x 3.23"W Product Dimensions: 0.5 x 3 x 3 inches Item Weight: 0.798 ounces Item model number: UV Filter Is Discontinued By Manufacturer: No Date First Available: August 18, 2015 Manufacturer: Hoya