Re: A thinner sensor stack may be possible after all!
Received my A7R back today and as promised tested the Zeiss 25/2.8ZM straight away.
Only managed to grab a couple of images in between rushing to meetings at work. The link contains the original and flatfield corrected DNGs and the JPGs with Lightroom corrections applied.
Please observe the top left hand corner in the second image. It is almost as sharp as I remember it on my Leica M240, hope to have time to test further at the weekend.
Very very happy with the conversion even the VC21/4 is acceptable.