The Nikon S2 with either 5cm lens is a sweet shooting experience. I've owned a number of different Nikkor SC 5cm lenses, but they have all been the f1.4 variety. Have longed to try an f2 version, but nothing has come my way (and now it would have to be in LTM as I sold my S2).
Here's one of mine, cropped to full pixel resolution from a Nikon Z6 (so I could remove any collimation or focus issues):
Close up:
And at distance of 100 yards:
If you look at the center of the flower on the lower left (what I was focusing on), and at the Stop sign, it's not that they are not in focus, it's just the low contrast/glowy/flare makes them look soft.
The f1.4 is very low contrast/glowy wide open, but comes along nicely at f2 and is quite good by f2.8. But wide open, it can appear a bit soft, mainly because of the low contrast/glowy/flare. Not sure the f2 suffers the same wide open, and not sure if the f2 is better wide open than the f1.4 is stopped down to f2.
Would love to see a side by side comparison, with two lenses that were properly collimated (if the f1.4 is out of collimation, it can be real soft wide open).
Best,
-Tim