contax biogon 21mm on Nex 7: poor performance with soft edges and cast

[macti]

I do own a biogon 21mm but haven´t used it yet on a digital camera. Reading the reviews on luminious landscape made me pretty hopfull that Nex7 can revive this little lens for me.
Hence I have put the Nex 7 on a preorder list.

However coming across this thread made me really think about cancelling the preorder:
http://http://forums.dpreview.com/forums/readflat.asp?forum=1042&thread=40244727

What do you think? What would be the right choice to get this lens on a digital body?

[stever]

have a look at Lloyd Chamber's blog diglloyd.com, if you're planning to use a NEX 7 with m-mount lenses it's probably worth subscribing.