The B+W T-Pro 010 UV Protection Filters are now slimmer and lighter than ever before featuring an innovative titanium finish, a robust brass mount and MRC Nano coating. The filters are dirt-repellent and scratch-resistant. This high-transmission UV filter offers outstanding protection to your lens, preventing damage such as scuffs. Manufactured with the meticulous German craftsmanship, these filters are exceptional for wide-angle lenses. Good for down to 17mm Full Frame Format MRC Nano Coating to Repel Dirt and Water. To select the appropriate filter size, check your lens. On all lenses from Canon, Nikon, Olympus, Samsung, Fuji and other manufacturers there is a printed diameter symbol that determines the filter size.