Canon EOS 5D Mk.4 Manual

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3 Customizing AF Functions N
Enables or disables the EOS-dedicated external Speedlite’s AF-assist 
beam.
ON: Enable
The external Speedlite emits the AF-
assist beam when necessary.
OFF: Disable
The external Speedlite will not emit the 
AF-assist beam. Useful when the AF-
assist beam may disturb others.
IR: IR AF assist beam only
When an external Speedlite is attac hed, only the infrared AF-assist 
beam will be emitted. Useful when you do not want to fire a series of 
small flashes as the AF-assist...

3 Customizing AF Functions N
140
You can set the AF operation charac teristics and shutter-release timing 
for One-Shot AF.
: Focus priority
The picture will not be taken until 
focus is achieved. Useful when you 
want to achieve focus before capturing 
the image.
: Release priority
Priority is given to the timing of shutter 
release instead of achieving focus. 
This gives priority to capturing the 
image rather than achieving precise 
focus.
Note that the picture will be taken 
even if focus has not...

141
3 Customizing AF Functions N
If focus cannot be achieved with autofocus, you can have the camera 
keep searching for the precise focus or have it stop searching.
ON: Continue focus search
If focus cannot be achieved with 
autofocus, the lens is driven to search 
for the precise focus.
OFF: Stop focus search
If autofocus starts and the focus is far 
off or if focus cannot be achieved, the 
lens drive will not be performed. This 
prevents the lens from becoming 
grossly out of focus due to the focus...

3 Customizing AF Functions N
142
You can change the number of manually selectable AF points. With 
Zone AF, Large Zone AF, or Automatic selection AF set, AF will be 
performed with the selected AF area selection mode (Zone AF, Large 
Zone AF, or Automatic selection AF) regardless of the [ Selectable AF 
point ] setting.
: All points
All AF points will be manually 
selectable.
: Only cross-type AF points
Only the cross-type AF points will be 
manually selectable. The number of 
selectable AF points will...

143
3 Customizing AF Functions N
You can limit the selectable AF area selection modes to suit your 
shooting preferences. Select the desired selection mode and press 
 to add a checkmark [ X]. Then select [ OK] to register the setting.
The AF area selection modes are explained on pages 109-111.
: Manual select.:Spot AF
: Manual selection:1 pt AF
: Expand AF area:
: Expand AF area:Surround
: Manual select.:Zone AF
:
 Manual select.:Large Zone AF
: Auto selection AF
Select AF area selection modeAF4
  The...

3 Customizing AF Functions N
144
You can set the method for changing the AF area selection mode.
:S 9 M-Fn button
After you press the < S> button, 
pressing the < p> (AF area selection) 
button or < B> button changes the 
AF area selection mode.
: S 9 Main Dial
After you press the < S> button, 
pressing the < p> (AF area selection) 
button or turning the < 6> dial 
changes the AF area selection mode.
You can set the AF point or the AF area selection mode + AF point 
separately for vertical sh ooting and...

145
3 Customizing AF Functions N
: Separate AF pts: Area+pt
The AF area selection mode and AF point (or zone) can be set 
separately for each camera orientati on (1. Horizontal, 2. Vertical with 
the camera grip at the top, 3. Vertical with the camera grip at the 
bottom).
When you manually select the AF area selection mode and AF point 
(or zone) for each of the three camera orientations, they will be 
registered for the respective or ientation. Whenever you change the 
camera orientation during...

3 Customizing AF Functions N
146
You can set the AI Servo AF’s starting AF point for when the AF area 
selection mode is set to Auto selection AF.
: Initial   AF pt selected
AI Servo AF will start with the 
manually-selected AF point when the 
AF operation is set to AI Servo AF and 
the AF area selection mode is set to 
Auto selection AF.
: Manual   AF pt
If you switch from Manual select.:Spot AF, Manual selection:1 pt AF, 
Expand AF area: , or Expand AF area:Surround to Auto selection 
AF, AI Servo AF...

147
3 Customizing AF Functions N
EOS iTR* AF performs autofocus  by recognizing faces and subject 
colors. EOS iTR AF works when the AF area selection mode is set to 
Zone AF, Large Zone AF, or Automatic selection AF.
* intelligent Tracking and Recognition: a fu nction that identifies the subject with 
the metering sensor in order for the AF points to track it.
u : EOS iTR AF (Face priority)
The AF point is automatically selected 
based not only on AF information, but 
also the human face and the...

3 Customizing AF Functions N
148
You can set either to stop the selection at the outer edge or it can cycle 
around to the opposite side in AF point selection.
: Stops at AF area edges
Useful if you often use an AF point 
along the edge.
: Continuous
Instead of stopping at the outer edge, 
the selection of AF point continues to 
the opposite side.
25
AF point selection movementAF5
 If [EOS iTR AF (Face priority) ] or [EOS iTR AF ] is set, the camera may 
take longer to focus than when [ Disable] is...