Well, in a short time you'll be able to do so, and with AF! IIRC this is the first MILC-EF adapter that allows AF. Of course, the AFD motor in the 50/1.8 isn't Canon's best AF motor, to put it mildly. I wonder how it will perform with Ring USM lenses like the 28/1.8 and 85/1.8. Happy shooting, Yakim.