101f: Selecting the AF OperationNSuited for still subjects. When youpress the shutter button halfway, thecamera will focus only once.When focus is achieved, the AF pointthat achieved focus will be displayed,and the focus confirmation light <o>in the viewfinder will also light up.With evaluative metering, theexposure setting will be set at thesame time focus is achieved.While you hold down the shutter button halfway, the focus will belocked. You can then recompose the shot if desired.This AF operation is suited for moving subjects when the focusingdistance keeps changing. While you hold down the shutter buttonhalfway, the subject will be focused continuously.The exposure is set at the moment the picture is taken.When the AF area selec ion mode is set to 19-point automa ic selection AF(p.103), the camera first uses the manually-selected AF point to focus. Duringautofocusing, if the subject moves away from the manually-selected AF point,focus tracking continues as long as the subject is covered by the Area AF frame.One-Shot AF for Still SubjectsFocus confirmation lightAF pointAI Servo AF for Moving SubjectsIf focus cannot be achieved, the focus confirmation light <o> in theviewfinder will blink. If this occurs, the picture cannot be taken even if theshutter button is pressed completely. Recompose the shot and try tofocus again, or see “When Autofocus Fails” (p.109).If [z1: Beep] is set to [Disable], the beeper will not sound when focus is achieved.After achieving focus with One-Shot AF, you can lock the focus on a subjectand recompose he shot. This is called “focus lock”. This is convenient whenyou want to focus on a subject not covered by the Area AF frame.With AI Servo AF, the beeper will not sound even when focus is achieved.Also, the focus confirmation light <o> in the viewfinder will not light up.
