Professional, wide-angle, single-focal-length lens with a fast f/1.4 aperture. Designed for use with Nikon�s FX-format SLRs. Incorporates Nano Crystal coat for outstandingly sharp images, even in low-light. Boasts a 9-blade rounded diaphragm for super-smooth bokeh. A robust and reliable performer, its outstanding optical performance makes it the ideal lens for photographers who want a hard working lens.