Canon et 74 lens hood for ef70 200mm f40l usm
Canon et 74 for ef70 200mm f40l usm lens hood lens 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