This B+W #970 62mm srew In Metal Wide Angle Lens Hood is designed to protect the lens from blaze light that enters the lens by shading and extending the end of the lens. and also protect it from any physical damage. The light coming from extreme angles is blocked by this B+W lens hood. It is constructed from black anodised aluminium. This lens is designed for wide-angle lenses up to 70° angle of view.