hi everyone, a little new to photography. i just picked up the s80. i understand basics such as aperature, shutter speed, white balance. i have a few questions though..... 1) exposure is interdependent on shutter speed and aperture. Say i adjust my shutter speed and aperture. then i alter the exposure increments. does that mean my aperture and shutter speed changed with my exposure change? 2) aperture priority mode and shutter speed priority mode, are they basically the same thing? in aperture mode, whatever you choose, an appropriate shutter speed will chosen for you, and if you are in shutter speed mode, the aperture will be chosen for you.... so technically the 2 gives you the same results? thanks!