ABS reversible-design allows you to mount the hood in reverse for compact-storage In backlight-, side light or photography, it can the entry of non-imaging light and avoid-haze The EW-65C Lens Hood is designed to 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 of extra-protection from accidental for RF16mm F2.8 Lens