Canon PowerShot SX500 IS User Guide - Page 110

Shooting Range and Focusing Changing the Focus Setting Still Images You can change default camera operation of constantly focusing on subjects it is aimed at, even when the shutter button is not pressed. Instead, you can limit camera focusing to the moment you press the shutter button halfway. zzPress the button, choose [Continuous AF] on the [4] tab, and then choose [Off] (=47). Helps avoid missing sudden photo On opportunities, because the camera constantly focuses on subjects until you press the shutter button halfway. Off Conserves battery power, because the camera does not focus constantly. Still Images Shooting with the AF Lock Movies The focus can be locked. After you lock the focus, the focal position will not change even when you release your finger from the shutter button. 1 Lock the focus. zzWith the shutter button pressed halfway, press the button. XXThe focus is now locked, and [f] and the MF indicator are displayed. zzTo cancel AF lock, release the shutter button, hold the shutter button halfway down again, and press the button. 2 Compose the shot and shoot. 110