The Hoya 72mm HD Digital UV Filter is a multi-purpose fine-weather filter that absorbs the ultraviolet rays which often makes outdoor photographs hazy and indistinct. A multi-purpose filter for colour as well as black and white film and digital photography, the clear UV filter can also be left on the lens to serve as a permanent lens protector.72mm HD Digital UV Filter main featuresHD GlassHigh Density Sharp Cut UV GlassChemically Enhanced Optical Glass is 4x StrongerHD Coating8-layer Anti-Reflective Multi-CoatingWater & Oil Repellent, Scratch & Stain ResistantHD FrameWide-Angle Lens Compatible Ultra Thin FrameGlass Mounted with High Pressure Press TechnologyHardened Glass
Hardened optical glass that has 4 times the breaking strength in ANSI standardized testing (ANSI Z80.3 : 2001) where a steel balls of varying size and weight were dropped from a height of 50 inches onto the glass.Hardened 8 Layer Waterproof Multi-coating
Newly developed industry leading 8-layer multi-coating yields an average light transmission rate of 99.35% between 400 and 700nm (visible spectrum). These coatings greatly reduce reflections off the surface of the glass allowing you to capture more light in your photos. As with all Hoya multi-coatings, HD HMC is applied in a furnace at high heat, bonding the coating to the surface of the glass. This process is called "hard coating" and it is far more durable than other coating techniques. The chemistry of the top layer is formulated not just to be more durable but to be resistant to oil stains. This means that finger prints and other oils are much easier to remove.