Lens hoods are primarily designed to prevent unwanted stray light from entering the lens, extending and shading the lens's edge. Additionally, by extending the lens's edge, extra protection is provided against accidental impacts.

The "petal" shape of this hood maximizes coverage of the hood area with minimal weight and space. This specialized hood is designed to fit the specific focal length of the lens for which it was made.

• Lens hood for EF 24-85mm f/3.5-4.5 lens