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.
The "petal" shape of this lens hood maximizes the amount of hood coverage for the minimum amount of weight and hood area. This dedicated lens hood is designedto match the specific focal length of the lens it was designed for.
Reviewed by 2 customers
Not only does this hood show in the picture, it has no lock feature so it constantly comes off the lens
It's a lens shade, so it's designed to help prevent lens flare from bright lights around the scene you are photographing. It does just that - works well!