CowboyStudio Dedicated Lens Hood for Nikon AF-S 17-35mm f/2.8D, 16-35mm f/4G Lens (Replaces Nikon HB-23) One (1) Lens hood^Replacement for Nikon HB-23 Lens Hood^Compatible with Nikon AF-S 17-35mm f/2.8D, 16-35mm f/4G lens^Prevent unwanted stray light from entering the lens^Designed to prevent unwanted stray light from entering the lens