Hi Ron,
Love your snow set above, as well as your previous ice sets!
The ring is the lady's design. My idea to blur her face wasn't as successful as I initially thought. The ZM 85 is scary sharp on the SL. I first included a shot of the lady (in focus) at f/2 but quickly removed it because it wasn't flattering at all. It's so easy to hit critical focus with the SL, while with the M, I was always slightly off, which helped to hide skin blemishes with portraits. As for wides, I have noticed field curvature that bends away from the camera in the corners. The trick is to front focus slightly when image borders/corners are important. I have found that I can get excellent results by using peaking on the whole frame, as it gives me an idea what areas are in focus and what areas are not. Focusing in the center with magnification is a guarantee the corners will be blurred. This said, the ZM 35/1.4 seems to be immune to this field curvature, probably because it was designed with the cover glass in mind.