I hear there are many incarnations of the 1.4/35 Nikkor and different
versions
too. Chris Dees who sold me his replaced it with an older version.
Can someone elaborate on the history? Roland? Bjørn?
I'll take the bait
. In a nutshell, all manual focus 35/1.4 lenses have more or less the same optics: a 9/7 element lens with CRC. All are fully multi-coated.
The NIKKOR-N 35/1.4 Auto was released in 1970. It has an all-metal scalloped focus ring and 9 aperture blades. The aperture range is from f1.4 - f22, the largest range of any Nikkor (compared to the 35/2 from the same period the aperture extends a stop in both directions). Early models are marked "Nippon Kogaku Japan", later changing to "Nikon". The last in the early series is marked "NIKKOR-N.C" where the ".C" acknowledges the multi-coating which was there all along. The number of aperture blades reduced to 7 at this point - maybe the large number of aperture blades in combination with the large aperture range made the diaphram too slow in high-speed photography.
At the end of 1975 the "New Nikkor" or "K" type was introduced with modern styling. The optics were also tweaked at this point. Though the basic lens construction remained unchanged, the glass material and the lens curvature were changed to improve the performance at open aperture (the earlier models uses some slightly radioactive high-refractive glass which turned yellow over time)
In 1977 the lens was updated to AI with no changes to the optics. The aperture range reduced slightly, the minimum setting is now only f16.
In 1981 the lens was updated to AIS with no changes to the optics. The barrel has new styling and the focus throw was shortened.
There were also improvements to the NIC multi-coating over this time, and somewhere around serial no 479xxx the coatings changed to the yellow-green SIC coating.
The 35/1.4 is one of the few AIS lenses that is still in production.