Canon ET-65B Lens Hood for EF 70-300mm f/4.5-5.6 IS and DO IS USM Lenses Designed to prevent unwanted stray light from entering the lens Ensures no problems with vignetting or motor functions Added benefit of extra protection from accidental impact Compatible with 70-300mm f4.5 to f5.6 DO-IS and EF 70-300mm f4-5.6 IS USM USM lenses