E.M
Well-known
I got a new Nikon F2 in 1973 , with a new Nikkor 50 f1:1.4 , was that an S-type at that time ? It was a very good lens and I liked it even wide open , maybe I had a good copy ?! Can you test it before you buy ?
I got a new Nikon F2 in 1973 , with a new Nikkor 50 f1:1.4 , was that an S-type at that time ?

Sevo
You are correct, there are two versions of the AIS 50mm f/1.8. The first had the same optics as as my AI, and the latter pancake lens was similar to the Series E.
: : :
The series E lens is single coated, and seemed to lack flare resistance. Also, at the time, people were complaining about the AIS version's tendency to ghost.
The early 5.8cm f1.4 Nikkor which was the first fast lens for the then new Nikon F is a very nice lens to try but they are not now easy to find
as they were only available for a short time until replaced by the 50mm f1.4.The lens has a unique signature and has many
devotee's and I know that Roger Hick's is one of them.
See:- https://www.photo.net/discuss/threads/nippon-kogaku-nikkor-s-f-5-8cm-f1-4.99183/
I know few of you will follow my path in replacing your Nikkors with Voigtlander. However, for Nikon F, F2 use, look for the first generation of the Voigtlander (or Zeiss ZF) lenses. They have the metering prong to mesh with the F, or F2 non-AIS meter heads.
The earlier all-metal, close focus pancake version that I am showing above (see also http://www.destoutz.ch/lens_50mm_f1.8_2257006.html) is multi-coated; flare resistant, compact, performance very similar to a v3+ Summicron, IMO. It was released in Japan in 81, where the Series E came later (1986, single-coated, plastic focus barrel, longer min. focus, see also http://www.destoutz.ch/lens_50mm_f1.8_4121878.html). Two very different lenses.
Any thoughts about the Nikkor 45/2.8 GN?
B2 (;->
First version as in Pre-Ai?