I have a problem here. I just bought a Canon 7D and was playing around with the settings in Av mode.
I noticed when looking through my viewfinder and rotating my quick dial (the dial behind the camera, not the one on top), it not only changes the shutter setting, but also the exposure! This happens for manual mode and shutter moder.
This becomes very irritating as sometime i need to quickly change my settings while looking through the viewfinder. Is there anyway to lock the exposure?