GSI Super Quality Lens Hood for CANON EF 70-200mm f/4L IS USM and CANON EF 70-200mm f/4L USM Lenses - Functions Exactly as the Canon ET-74, Provides Protection from Light and Impact
This GSI Lens Hood is 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. Fits the lens perfectly. Great affordable alternative to the Canon ET-74.