Description
This lens hood is designed to fit the Canon Ef 75-300MM F 4.0-5.6 Usm II II Usm III & III Usm Lenses and is specifically designed to shade and prevent stray light from entering the 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. Dedicated lens hoods are designed to match the specific focal length of the lens it was designed for.