Vassily,
I did not know all this and had I known it, I would have upped the price and included it in the description of the lens!
Anyway, I sold it to a fellow member whom I greatly admire for his portraiture with (longer) lenses and who will put the lens to good use, I'm confident! So in fact we will likely all profit from him using it by viewing his portraits. I wasn't doing the lens justice, did not use it enough!
Now, I still have the ZK Sonnar 2.0/50mm for sale, in case your GAS returns! 😀😛
Hey Johan, that's too kind words ;-)
The lens arrived and I am extremely exited to use it!
Now the time starts for me, to investigate into the history of this lens and Russian and German Sonnar lenses in general - you may have very well placed a bug here ;-)
I do absolutely love Sonnar lenses, especially the Japanese ones so far. I hope to extend this more into Russian and German wartime lenses.
Your lens looks to have absolutely beautiful glass indeed!
I didn't have a chance yet, to shoot with it - here are a few first drive by shots @ ƒ2, as I couldn't wait for the time, to try it out:
See the moire on the textile of the baby push cart - that's the old Sonnar out resolving the M9 sensor wide open, as shot from a moving car - I am in awe for that old glass sometimes!
I could not test the lens thoroughly, but first handling indicates, it doesn't fully reach infinity wide open (to be expected as a long Sonnar and as of it's very good performance in close to medium range).
It also seems to mis-focus a little at closest distance 1.8m (behind the subject), but I have to recheck my RF settings, as that is overdue.
From what I see, none of this is something a good fine calibration could not fix.
I am really looking forward to see this lens on the Monochrom.
The wartime Sonnar virus is in full effect now ;-)
Thanks again to everybody here sharing so much information on these lenses on RFF - it is absolutely enlightening to read through all these threads (some serious Sonnar addicts around here - hehe)!