Canon EOS 7D - Manual (Page 230)

230
3 Custom Function SettingsN
C.Fn III -11 AF-assist beam firing
The AF-assist beam can be emitted by the camera’s built-in flash or by an
external, EOS-dedicated Speedlite.
0: Enable
1: Disable
The AF-assist beam is not emitted.
2: Enable external flash only
If an external, EOS-dedicated Speedlite is attached, it will emit the AF-
assist beam when necessary.
3: IR AF assist beam only
Among EOS-dedicated Speedlites, only those which have an infrared AF-assist
beam will be able to emit the beam. This prevents any Speedlite which uses a
series of small flashes (like the built-in flash) from firing the AF-assist beam.
C.Fn III -12 Orientation linked AF point
The AF area selection mode and manually-selected AF point (or Zone selected
with Zone AF) can be set separately for the vertical and horizontal orientations.
0: Same for both vertical/horizontal
The same AF area selection mode and manually-selected AF point (or
Zone selected with Zone AF) are used for both orientations.
1: Select different AF points
The AF area selection mode and manually-selected AF point (or Zone
selected with Zone AF) can be set separately for each camera
orientation (1. Horizontal, 2. Vertical with the camera grip at the top, 3.
Vertical with the camera grip at the bottom). Convenient when, for
instance, you want to keep using the right AF point during all camera
orientations.
Setting procedure
Manually select and set the AF selection mode and AF point (or Zone
with Zone AF) for each camera orientation (1. Horizontal, 2. Vertical with
the camera grip at the top, 3. Vertical with the camera grip at the bottom).
When this is set, the camera will switch to the AF area selection mode
and manually-selected AF point (or Zone selected with Zone AF) to suit
each camera orientation.
If the external, EOS-dedicated Speedlite’s [AF-assist beam firing] Custom
Function is set to [Disabled], the Speedlite will not emit the AF-assist beam
even if the camera’s C.Fn III -11-0/2/3 is set.