Canon EOS Rebel T2i EOS REBEL T2i / EOS 550D Instruction Manual - Page 66

E: Changing the AF ModeN You can select the AF mode suiting the shooting conditions or subject. In the Basic Zone modes, the optimum AF mode is set automatically. 1 On the lens, set the focus mode switch to . 2 Press the button. X [AF mode] will appear. 3 Select the AF mode. Press the key to select the AF mode, then press . 4 Focus the subject. Aim the AF point over the subject and press the shutter button halfway. The camera will then autofocus in the selected AF mode. One-Shot AF for Still Subjects Suited for still subjects. When you press the shutter button halfway, the camera will focus only once. When focus is achieved, the dot inside the AF point achieving focus lights briefly in red, and the focus confirmation light in the viewfinder will also light. With evaluative metering (p.86), the exposure setting will be set at the same time focus is achieved. While you hold down the shutter button halfway, the focus will be locked. You can then recompose the shot if desired. 66