The 16mm f/2.0 ED AS UMC CS Lens for Nikon F Mount from Rokinon is a manual focus wide-angle lens compatible with APS-C format DSLR digital cameras. It provides an 83.1° angle of view which translates into a 35mm format equivalency of 24mm. A fast maximum aperture of f/2.0 is effective in low light shooting and provides shallow depth of field. With two aspherical lens elements and one extra-low dispersion element, chromatic aberrations are minimized and sharp, color-accurate images are the result. UMC lens coating facilitates even light transmission and reduces ghosting and flare. Wide angle focal length equivalent to 24mm in the 35mm format Fast f/2.0 maximum aperture for effective low light shooting and shallow depth of field Aspherical and Extra-low Dispersion lens elements reduce aberrations UMC lens coating allows even light transmission and minimizes ghosting and flare