This ET-78B lens hood prevents flare and ghosting, caused by stray light entering the lens. Its designed to fit the EF 70-200mm f/4L USM II lens, and is particularly useful when shooting into the light. The lens hood also helps to protect the lenss front element from accidental damage. Benefits Maintain image quality by preventing flare and ghosting Protect the lenss front element from physical knocks and scrapes Stops rain from sticking to front element spoiling images Can be reversed and fitted to the lens to save space in storage Lightweight design wont weigh you down What\'s in the box Canon Lens Hood ET-78B Compatibility EF 70200mm f/4L IS II USM