New eos to nex adapter, with electronic integration of aperture diaphragm...

■True electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes.
■Powered by camera body. No external power source required.
■Wide open button (opposite of depth-of-field preview function) makes manual focusing easy.

Sony NEX System : Canon EF Lens to Sony NEX Smart Adapter


It's a bit expensive. For the same price you can buy a canon camera body, but there is the possibility for using it.
I'm imaging a 85L or a 135L with a NEX7... mmm...