Robert Benson modified his Canon EOS 5D Mark II DSLR camera and attached a Leica Noctilux 50mm f/1.0 lens:
This has been my obsession for more than a two months, and its now complete. The camera above is (was) a Canon 5dmk2. I wanted to use Leica rangefinder “M” lenses on it, but of course you cant, because the Leica flange distance is really short – shorter than the Canon EOS – the Leica have to be mounted closer to sensor to work. So I ripped apart a camera, modified it, and now I have a camera better than the Leica M9, at a fraction of the cost. Want one?
Read the details of the modifications, including some sample images (via CR).