Rokinon 12mm F2.8 Full Frame Fisheye, Manual Focus Lens for Nikon F Mount with AE Chip Rokinon 12mm F2.8 Full Frame Fisheye Lens for Nikon F Mount with AE Chip Mount - Removable Petal-Shaped Lens Hood - Front Lens Cover - Rear Lens Cap - Rokinon 1 Year Limited Warranty An ultra wide-angle fisheye lens with a 12mm focal length on full-frame cameras and a 19.2mm equivalency when used on APS-C format cameras. Its distorted perspective is useful for interiors, landscapes, group shots and many creative wide-angle applications. Extra low dispersion and aspherical lens elements reduce aberrations for sharp, color-accurate imaging. Nano crystal coating and ultra multi-coating on the lens elements improves light transmission and reduces ghosting and flare.