The NIKKOR Z 20mm f/1.8 S from Nikon is a versatile prime well-suited to a range of subject types, from architecture to interiors to landscapes. Complementing the optical design, a multi-focus system, which employs two-stepping motors, helps to realize impressively fast, accurate, and quiet focus performance, along with full-time manual focus override, to suit both stills and video needs. A prime wide-angle lens is designed for FX-format Z-mount mirrorless cameras, however, can also be used with DX models where it provides a 30mm equivalent focal length. Three aspherical elements are used to reduce spherical aberrations and distortion in order to realize sharp imagery with accurate rendering. A Nano Crystal Coat, along with a Super Integrated Coating, has been applied to lens elements to minimize surface and internal reflections for a marked reduction in lens flare and ghosting. Full-time manual focus override is also possible and an internal focusing design is used, where only the internal lens groups are moved during focusing, to maintain the overall length of the lens during use and to promote faster-focusing speeds. A specialized electromagnetic aperture mechanism provides greater exposure control stability that is especially beneficial when working with fast continuous shooting rates.