The Nikon AF-S Zoom Nikkor 14-24mm f/2.8G ED AF Lens is an extreme ultra-wide zoom, wide-aperture lens that delivers edge-to-corner sharpness that can surpass that of equivalent fixed focal-length lenses. It features a Nano Crystal coating to reduce the effects of ghost and flare, combined with 2 ED (Extra-low Dispersion) elements and PGM aspherical lenses that help control chromatic aberrations. These all combine to enhance sharpness and contrast. The Silent Wave Motor (SWM) feature provides swift autofocus with superior accuracy and ultra-quiet operation. This G-type lens does not feature an aperture ring on the lens body, resulting in a lighter and more compact lens. Aperture changes are designed to be done via the camera's command dial.