The LH-40 Lens Hood for Olympus M.Zuiko 14-42mm Lens from Olympus is designed for use with the Olympus M.Zuiko Digital ED 14-42mm f/3.5-5.6 II or the Olympus M.Zuiko Digital 14-42mm f/3.5-5.6 II R lens. 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.