Shield the front element of your AF-S NIKKOR 20mm f/1.8G ED lens from stray light with this bayonet mount HB-72 Lens Hood from Nikon . By blocking excess light, it prevents flare. Additionally, because it protrudes from the end of the lens, it offers some extra protection against light impact in case you get too close to your subject. The hood is included with the lens and offered here as a spare or replacement part.