When you take a picture with your camera set on Auto mode, you are delegating responsibility for determining the correct exposure to the camera. Depending on the 'brain' (or programmed chip) inside your camera, the result may be pleasing or not to your satisfaction. But before you blame the camera for your lousy pictures, it pays to understand a bit what goes on behind the scenes when you press the shutter release button. In this tutorial, we are going to look at what 'correct exposure' means.