AI version, in near-mint condition, with perfect optics, with original caps, four filters, case, maker's box with matching number, Japanese warranty card and instructions (case and box worn). At the time of its introduction, the Nikon 13mm was the world's widest non-distorting professional SLR lens. It allows to get closer to the subject, stretches distances and creates images from perspectives otherwise unimaginable. Only about 350 were made in 22 years (1976-1998), and only to special order. The lens is rarely appearing on the market and it is hard to find in this good condition.