Canon ET-67B Lens Hood for EF-S 60mm f/2.8 Macro USM Lens - Compatible with Canon DSLR Cameras - Perfect for Macro Photography, Portraits & Close-up Shots

The Canon ET-67B Lens Hood, as with other lens hoods, is made to keep undesired side lighting from entering the lens.  It does this by extending and shading the end of the lens. Furthermore, since the hood extends from the lens, it gives extra protection from accidental impact.   It is removable and attachable in reverse to take up as little space as possible when storing in camera bag.