Nikkor-H 28mm/2.8cm f/3.5 Non-Ai is a retrofocus-type design wide-angle lens once used by photojournalists covering in Vietnam War. The 28mm employs Nikkor's fine optics delivering high quality results. The lens employs six elements in six groups optical construction. The lens features a graduated distance scale in meters and feet from 0.6m and 2 feet to infinity. Additional attributes include five iris blades, 74° angle of view and 52mm filter thread.