Nikon 5.6/6 mm Fisheye-Nikkor 220 circa 1970. very rare lens
Nikon 5.6/6mm Fisheye-Nikkor 220 ca.1970. very RARE lens. 333544 one Edge broken - see Picture - with cap, only around 200 of these lenses were made, together with the famous 2.8/6mm, the 5.6/6mm is the widest Nikkor lens ever made.