Manfrotto Professional Protect Filter 77mm offers superior protection against dust, moisture and scratches and can permanently remain on the lens. It has been designed specifically for the Professional photographer who requires maximum protection of his photographic gear. The Professional Protect filter is water repellent, scratch and oil resistant, and has a unique antistatic coating. It includes 12 layers of coating ensuring a stronger anti-reflective surface and allows 99.3% light Coating Each Manfrotto filter has been developed with the highest level of precision. The elaborate multi-coating process effectively minimizes reflections and maximizes the light transmission, hence delivering remarkable optical quality. The anti-reflectiveness of filters increases in parallel to the increase in the number of layers of coating. Additionally, as a result of the multi-coated layers, Manfrotto filters ensure a superior level of protection against dust, moisture and scratches. Technical Specifications Antireflective Coating; Antistatic Coating; Country Of Origin Japan; Diameter 3.03 in; Filter Type Protect; Light Transmission 99.3%; Number Of Coating Layers 12; Protective Case; Scratch Oil Resistant; Water Repellent; Weight 0.06 lbs.