"The single button press does indeed work with Canon bodies; when CF 12 (MLU) is activated along with the 2sec or 10sec self timer, you press the shutter release, the mirror pops up and the timer starts, 2 or 10 seconds later the exposure occurs and the mirror drops. "
Well, that sort of defeats the whole purpose if you've got to dig through and activate MLU first, doesn't it. It was implied in the previous post that just using the delay would pop the mirror up first, and it doesn't. If I've already got the MLU activated, I'm probably going to use a cable and not the self timer at that point.