Canon ew 78c lens hood for 35mm f14l usm
Canon ew 78c for 35mm f14l usmlens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens in addition since the end of the lens is extended you also get the added benefit of some extra protection from accidental impact dedicated lens hoods are designed to match the specific focal length of the lens it was designed for