<p>Thanks for all the responses! Very useful indeed. So what I take away from this is that the 50's and the 90 should work ok, as should the VC 15, but that the other wide lenses may have smeared corners and other problems. <br>
I guess I'll try them all and sell the ones which don't work, and buy some Zeiss lenses to replace them.<br>
In addition to the lenses listed above, it turns out I have a 35/2 aspherical Summicron. I don't really like that focal length all that much, and if on top of that it doesn't work well on the A7, so I think I'll sell it. It is a recent model and should bring enough to buy a couple of Zeiss lenses. Also a Leica 90/4 and a 40/2 Summicron off a Leica CL I used to have. The 40/2 is a gorgeous lens and super compact -- that will just be great if it works on the A7.<br>
I also have a bag full of Nikon lenses which I had forgotten about. Old manual focus ones I used on an F3 a million years ago when I did it professionally for a while. I guess these should work excellently on the A7. As it turns out, the seller of my A7 threw in a Nikon adapter. None of this glass is anything like the Leica glass, but could be fun to play with.<br>
One of them is an old 28mm PC Nikkor -- perspective correction -- which I used to use for architectural stuff, but which I always LOVED. I hope it will work on the A7. I had great fun with this lens back in the day (and earned some money with it, too).<br>
If I can't get any of my wide lenses to work, then I will need something about 20 or 21 and a 28. I love my tiny VC 28, which would make the A7 truly pocketable, but based on what I have read, I guess there is little chance it will work well. Then I will have to choose between a bulky VC 28/2 or one of the Sony/Zeiss ones. </p>