your camera has three main focus modes. The auto focus modes are single server or one shot if you're shooting with a canon camera and continuous or AI servo. For canon users, single focus mode is ideal for static subjects such a still life or landscapes because in this mode the camera focuses on the subject, and it locks. Focus at that distance until you take the picture or end auto focus by removing your finger from the shutter button or the on button. Now, if the subject moves closer to or further away from the camera, the camera won't make any adjustment. So if you take the picture, the subject will be out of focus. In continuous mode, however, focus remains fluid. The camera focuses on the subject. It doesn't lock focus. If the subject moves, the camera will adjust. Focus. Distance too much. This focus mode is ideal for action photography, such a sports and wildlife or any situation where the subject is moving. Now. The third focus mode is the dreaded manual focus. Most of the time...
, you won't need to engage manual focus, but there are times when it's the quickest and most accurate way of focusing a camera, which I'll tell you about later on. For now, though, I'm going to focus on auto focus if you'll excuse the pun.