6d 3 shot multiple exposure bracketing question... I have to manually take the shot 3 times, even after setting up multiple exposure / bracketing? I could not find how to take all 3 shots after pressing shutter release button one time. I should just be able to set it up for one or two stops, compose picture, press button half way to focus, and fully one time, to take the 3 shots, no? If not that's kind of ridiculous.