UV filter is the timehonored, multifunctional filter; it blocks UV light from entering the lens and therefore reducing blurring, haziness and blue casting. At the same time, it is a very useful tools to add protection to the lens against dust, moisture, scratches, and can permanently remain on the lens. The Manfrotto Essential UV Filter 77mm is water repellent, includes 8 layers of coating which provide an antireflective surface and allows 99% light Coating Each Manfrotto filter has been developed with the highest level of precision. The elaborate multicoating process effectively minimizes reflections and maximizes the light transmission, hence delivering remarkable optical quality. The antireflectiveness of filters increases in parallel to the increase in the number of layers of coating. Additionally, as a result of the multicoated layers, Manfrotto filters ensure a superior level of protection against dust, moisture and scratches. Technical Specifications: Antireflective Coating; Country Of Origin Japan; Diameter 3.03 in; Filter Type UV; Light Transmission 99%; Number Of Coating Layers 8; Protective Case; Water Repellent; Weight 0.06 lbs.