The PC-Nikkor 28mm F/4 is a retrofocus, wide-angle perspective-control prime lens designed for 35mm Nikon SLR cameras. Its shifting or perspective-control technology makes it an effective lens in an array of photographic applications, including architectural, industrial and commercial photography. The optical axis can be shifted eccentrically around the picture frame axis up to 11mm, a provision that could be accomplished only in large view cameras. Additonal features include 10 elements in 8 groups optical construction, 9-blade diaphragm, 74° picture angle at infinity, 1ft close focusing distance producing 1:6.9 max magnification ration and 72mm filter thread.