I have recently acquired a new digital camera from my father (a stylus verve). Anyway I decided to learn all of the terms in the menu and different techniques behind the picture, and have been reading up on the internet lately. My question is, what is the main difference between ISO and EV? They both seem similiar controlling shutter speed and brightness of image. But how do you know which one to change in a given situation? (P.S sorry if i sound like a complete newb) Thank You everybody!