Silent Wave AF Motor Extra-low dispersion glass Rear focusing A fixed focal length lens with an impressively bright aperture, the Nikon 24mm f/1.4G AF-S ED excels at low light and landscape photography and is best suited to an experienced photographer in possession of a full frame DSLR, such as a D3x. The Nano Crystal coating prevents reflections within the lens from causing ghosting and flare. It is one of a number of advantages the Nikon 24mm f/1.4G AF-S ED has over the predecessor D version, including the Silent Wave AF motor. The Nikon 24mm f/1.4G AF-S ED offers a bright maximum aperture that aids focus and photography in dwindling light, reducing the ISO so digital noise will not become a problem. The Silent Wave Motor makes the focus quick and quiet, so taking images within a church will not cause a disturbance when readjusting focus. Having extra-low dispersion glass means the chromatic aberration is kept to an absolute minimum, virtually eliminating the presence of fringing while rear focusing keeps the front element stationary so filters attached are not disturbed.