Adorama Dedicated Lens Hood for Nikon 12-24mm f/4G, 17-35mm f/2.8D AF-S & 18-35mm f/3.5-4.5 D-AF Lens (HB-23)

One of the most important accessories for each lens you own. A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles.