I've recently upgraded from a 30D to a 1Dmark2N and while I was using 30D or even 20D the aperture and shutter speed settings remains even when I change aperture in aperture priority mode. This however doesn't imply to the 1d series. Maybe I still new to the camera but I've look tru the manuals for the custom and personel functions and there's still no info regarding this. This greatly affect my style of shooting cos I use manual mode for flash photography and aperture priority when shooting ambient. By the time I switch settings the moment is gone. To all seasoned users pls enlightened.