Robert, excellent shots Welcome also to the thread! You have presented of a variety of lenses to compare.
Joe, great shots!!! Love them Excellent conversion and rendering!
Jeff, thank you for the links to your blog. Great contribution and reading
Luka, I would steer clear of the ZM 35/2 Biogon, as I had this as one of the original lenses, and did not perform typical of the Zeiss family. I was disappointed with it. I ended up with the 35 Summicron Asph instead. No comparison IMO.
The ZM 35/2.8 is meant to be excellentl and very compact. Martin and Dan have experience with this lens.
The ZM 85/2 is meant to be exceptional lens, still made in Germany, second to none and rumour is that it is meant to be better than the 90 Summicron Asph APO.
The ZM 50/1.5 Sonnar is a great lens, but you have make absolutely certain that the calibration for the lens is set for sharp focust at f/1.5 at MFD, and not f/2.8 which is the norm. There is a lot of the frustration in the forums, I would safely assume is the result of the wrong calibration setting. This lens has beautiful rendering, a more classic style and very unique.
Welcome also to the thread! You have presented of a variety of lenses to compare.