The Olympus LH-55B Lens Hood for Select Olympus Lenses helps reduce lens flare caused by stray light from the sun or other light sources. Lens hoods also provide a degree of protection for the lens against accidental impact. The LH-55B lens hood is compatible with the 9-18mm f/4.0-5.6 Zuiko ED Lens and 12-50mm f/3.5-6.3 M.Zuiko ED Lens from Olympus. It is a black, rectangular type lens hood.