Voigtlander Nokton 50/1.2 in M mount - first impressions & more
I finally did it. While not needing any more 50mm lenses (I've got the Zeiss 50/2 and 50/1.5 among others), I decided to buy the new CV 50/1.2. I ordered it from Robert White in the UK and I received it two days ago.
The build quality is absolutely fantastic - and the 12-bladed aperture, with its wide range (from 1.2 to 22) is a wonder to watch. I find the lens to be very compact for it's speed, given that it's rather short (significantly shorter than my Zeiss 35/1.4). All in all, there's nothing to complain about - at least mechanically.
At this point, I must make a confession. I am one of those (annoying) characters who always test a lens when they buy one. My first concern was to test it for proper focus at minimum distance. To my disappointment, I find it to front focus both on my Zeiss Ikon (1.25cm front focus at 70cm distance) and my Leica M6 (0.75cm front focus at 70cm distance). After these findings, I decided to check it for focus shift. And yes, it's there. Not as pronounced as in my C-Sonnar, but it's certainly a thing to consider. In my case, the focus shifted backwards as I closed down and I obtained perfect focus on F2.8 on my Zeiss Ikon and on F2.0 on my M6. In other words, the people at Cosina - much like their counterparts from Zeiss, adjusted the lens for best compromise across all apertures. And this begs the question: do you think it really is the best compromise or should I have it adjusted for F1.2 or F1.4? If so, should I send it to Cosina or to other repairshop?
Otherwise, the lens is very sharp. Even with the slight front focus, the results were very promising. I would say that the 50/1.2 is sharper wide open than my C-Sonnar (wide open).
All in all, I'm pleased, but I agonize whether to adjust it or not. Your suggestions or comments will be greatly appreciated.
PS My apologies for my English - and for the evident hurry in which I wrote this post.