ssymeono Loc: St. Louis, Missouri

In case you don't know, Nikon introduced the 55mm, f/1.2 in 1967, in the period before Automatic Indexing or Non-AI era. Four improved models we produced in subsequent years culminating to the last one in 1977 that was an AI model (serial numbers begin with 400XXX). In the very next year, 1978, Nikon discontinued this lens in favor of a much better design, the Classic 50mm, f/1.2 as an AI lens and in 1981 the even better AIS. If you lens has the 400XXX serial number, it is not only rarer because it was produced for one year only but can also be used with most professional and serious amateur Nikons up to the present. If it's a Non-AI, it may only be used with the Df. To this day, there are still labs that can change a Non-Ai lens to an AI fro a small fee (about $25).

Vinman

In safe storage in my attic. I'll pull it out, just give me a little time.