When the rays from a strong light source, such as the sun, strike the front surface of your lens at a shallow angle, they cause flare which can rob your photos of contrast and color saturation. 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 simply by adding this lens hood. This lens hood is used on the 18-70mm Lens, the 18-105mm Lens, and the 18-140mm VR Lens..