Opteka ET-65B Lens Hood for Canon EF 70-300mm f/4-5.6 IS USM & EF 70-300mm f/4-5.6 IS DO USM Lenses Replacement for Canon ET-65B Lens Hood Compatible with the Canon EF 70-300mm f/4-5.6 IS USM & EF 70-300mm f/4-5.6 IS DO USM Lenses Prevent unwanted stray light from entering the lens Extra protection from accidental impact Designed to match the specific focal length of the lens