I use the vg10 and vg20 daily. I often put a 50 1.2 on it and get great result.
The aperture controls in this camera are dicky and I actually prefer using the manual ring that is part of the $50 adapter I use.
nice.
but will it allow focus on 85 1.2 ?
if it does, I'll buy it right away 
uuhhhh apparently it does!
Isn't it aperture only?
yes, it is aperture only, but apparently it powers the MF motor of the 85 II.
the 85 doesnt have mechanical MF, it needs electricity.
btw I tried my $20 EF adaptor (I use it for a nikon lens, long story) with the 85
and... well let's say that I may change my mind... the 85 dwarfs the camera and the adapter looks kinda ugly. here are some pics.
http://imgur.com/a/vEJhQ#0the nex may be amazing but it probably wouldnt feel right to walk with nex+85L. I'll stick to vintage lenses.