Janco Lens Hood for Canon EF 16-35mm f/2.8L, EF 17-35mm f/2.8L & EF 17-40mm f/4L Lenses as Canon EW-83E
A lens hood provides multiple functions: First, it shades the lens from stray light, improving your contrast and image quality.Second, in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; Third, it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles. This lens hood is designed to replace the original Canon EW-83E, it is Compatible with the following Canon lenses:** EF 16-35mm f/2.8L** EF 17-35mm f/2.8L** EF 17-40mm f/4L