GSI Super Quality Lens Hood for CANON EF24-85mm f/3.5-4.5 USM Lens - Functions Exactly as the Canon EW-73II, Provides Protection from Light and Impact Replacement for Canon EW-73II Lens Hood, Compatible with Select Canon Lenses for High Quality Cameras Prevent unwanted stray light from entering the lens Extra protection from accidental impact Designed to match the specific focal length of the lens