A lens cover or lens cap provides protection from scratches and minor collisions for camera and camcorder lenses. Lens covers come standard with most cameras and lenses. Some mobile camera phones include lens covers, such as the Sony Ericsson W800 and the Sony Ericsson K550. A more secure lens cap is the metal screw-in lens cap which cannot pop off a lens accidentally. Although a screw-in cap takes more time to remove in order to take a photograph than a standard lens cap, it is stronger than plastic and therefore more protective.VY Optics is a professional manufacturer of photographic accessories,size of lens cap shown on picture is 37mm,other dimension is also available.The lens caps are fit for Canon,Nikon,Olympus,JVC,Kadak,Fuji,Casio and so on.Beside,we supply OEM service.