Canon EOS 5D Mark IV L-series Zoom Lens Kit オーナーマニュアル

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: Selecting the AF OperationN
Suited for still subjects. When you 
press the shutter button halfway, the 
camera will focus only once.
 
The AF point that achieves focus is 
displayed, and the focus indicator 
<o> in the viewfinder will also light 
up.
 
With evaluative metering (p.253), the 
exposure setting will be set at the 
same time as focus is achieved.
 
While you hold down the shutter 
button halfway, the focus will be 
locked. You can then recompose the 
shot if desired.
One-Shot AF for Still Subjects
Focus indicator
AF point
 
If focus cannot be achieved, the focus indicator <o> in the viewfinder 
will blink. If this occurs, the picture cannot be taken even if the shutter 
button is pressed completely. Recompose the shot and try to focus again 
or see “When Autofocus Fails” (p.158).
 
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 
subject and recompose the shot. This is called “focus lock”. This is useful 
when you want to focus on a peripheral subject not covered by the Area 
AF frame.
 
When a lens equipped with an electronic manual focusing function is 
used, after achieving focus, you can focus manually by turning the lens 
focusing ring while pressing the shutter button halfway (p.159).