Upload & Sell: Off
Sam, I noticed you recently added a CV40 f/1.4 (based on another post), and perhaps it's just a rental to try with the GXR, but I'm curious what you find from it in terms of field curvature.
I just received a used one today and have been playing with it on my M9. It's my first time using this lens and was surprised to find that it appears to have huge field curvature readily apparent with distant, relatively planar subjects (like a house across the street). For example, at f/5.6, if the house across the street is in focus, say about 25m away, then objects only about 5-10m away are in focus along the edges of the image. And it seems like the central 'sweet spot' for good focus is quite small on FF, maybe half the frame at most.
Let me know if you also notice field curvature on the GXR/NEX.