And which Leica lenses do you think a non-range finder coupled huge SLR lens could replace? Do you seriously think somebody won\'t buy a proper M-mount 35 Lux in order to have the benefit of a big and heavy lens that would not work with the optical viewfinder? And if so, do you think that there can be so many of them to threaten Leica lens sales?
By the way, you probably don\'t want to use the Contax 35/1.4 on an AA-less sensor. It does show its age and a 5DII is already too much for it - you won\'t get any benefit for pressing it further.