Nikon HN-1 Lens Hood (52mm Screw-In) for 20-60mm f/3.5-5.5 IX 24mm f/2.8 28 f/2 AI-S and 35mm f/2.8 PC 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. In less-than-ideal lighting conditions the performance difference can be substantial.