As far the WA's I've used on my Nikons, all I can say is that it would be highly doubtful that simply substituting Leica gear would have "improved" anything.

I'm not saying a lab could not find something to measure, just that that difference would not have made a significant change in the success of the photos.

Quote Originally Posted by illumiquest View Post
If a 4000$ Leica 21mm isn't better than a 650$ Nikon 20mm...
A $4000 Leica Lens is definitely better at being "jewelry".