Opteka EW-63II Lens Hood for Canon EF 28mm f/1.8, 28-105mm f/3.5-4.5 & 28-105mm f/4.0-5.6 SLR Lens Replacement for Canon EW-63II Lens Hood Compatible with the Canon EF 16-35mm f/2.8L, EF 17-35mm f/2.8L, & EF 17-40mm f/4L Lenses Prevent unwanted stray light from entering the lens Extra protection from accidental impact Designed to match the specific focal length of the lens