The dedicated canon ew 88 lens hood is specifically designed for use with the 16 35mm f28l ii usm 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 the quotpetalquot shape of this lens hood maximizes the amount of hood coverage for the minimum amount of weight and hood area thi