Protect the Lens:It can also protect the lens from scratches, fingerprint, and prevents from sand, rain and snow to extent. Suitable for Suitable for 80-200mm f/2.8 D Lenses. Adopts Mounting Can be firmly mounted on the lens. good solid, and wear-resistant. Avoid Unwanted Light:The lens hood can effectively avoid unwanted light and glare when backlight, side light, or night photography.