A smart ultra-wide, the AF-S NIKKOR 20mm f/1.8G ED from Nikon blends a desirable broad field of view with a sleek form factor, a bright design, and a sophisticated optical layout. The fast f/1.8 maximum aperture excels in difficult lighting conditions and also offers increased control over depth of field. The optical design incorporates both aspherical and extra-low dispersion element to minimize spherical and chromatic aberrations for greater sharpness and clarity. Also, both Nano Crystal and Super Integrated Coatings have been applied to reduce flare and ghosting for improved contrast and color accuracy. Balancing the optical attributes, the lens is also characterized by a Silent Wave Motor that produces fast, smooth, and quiet autofocus capabilities, along with the ability to manually override focus at any time for more selective control.