Overview: Lens hoods are primarily designed to avoid unwanted stray light from entering the lens by extending & 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. Compatible Products: Canon EF-S 18-55mm f/3.5-5.6USM Canon EF-S 18-55mm f/3.5-5.6 Canon EF 28-80mm f/3.5-5.6 IV USM/ V USMCanon EF 28-80mm f/3.5-5.6 III / IICanon EF 28-80mm f/3.5-5.6 Canon EF 28-90mm f/4-5.6 III / II USMCanon EF 28-90mm f/4-5.6 USMSpecification:3.2 x 3.2 x 0.8