Great addition to your EF 16-35mm F/2.8L USM - EF 17-40mm F/4L USM - EF-S 10-22mm F/3.5-4.5 USM. The Canon EW-83E Lens Hood, like all other Lens hoods, is primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens.
eBay