Bayonet style lens hood for the AF VR Zoom-NIKKOR 80-400mm f/4.5-5.6D ED lens.Use of specifically engineered Nikon lens hoods is highly recommended.In less-than-ideal lighting conditions, the performance difference can be substantial.Bayonet lens hood provided with select NIKKOR lenses.By reducing the amount of non-essential light falling onto the front lens element, lenses can better achieve their optimum optical performance, producing more saturated images.