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You can customize the Speedlite features to suit your shooting
preferences with Custom Functions.
1 Select [External flash C.Fn setting] on the [Flash control]
menu screen and press <0>.
2 Select the Custom Function number in the same way as
with Custom Functions for the camera, and change the
setting.
C.Fn-10: Takes effect when the 320EX is set as the slave unit
during wireless flash shooting. To save battery power, set
the auto power off timer to 10 minutes.
C.Fn-11: Takes effect when the 320EX is set as the slave unit
during wireless flash shooting. The master unit can
cancel the auto power off on the 320EX within eight hours
or one hour after the 320EX enters the auto power off
mode.
Selecting [Clear ext. flash C.Fn set.] on the [Flash control] menu
screen clears all set flash Custom Functions.
Setting Custom FunctionsN
Setting External Flash Custom Functions
Custom
Function
No.
Function
Setting
No.
Settings & Description
Reference
Page
C.Fn-01 Auto power off
0 Enabled
p.10
1 Disabled
C.Fn-06 Quickflash w/continuous shot
0 Disabled
p.10
1 Enabled
C.Fn-10 Slave auto power off timer
0 60 minutes
p.35
1 10 minutes
C.Fn-11 Slave auto power off cancel
0 Within 8 hours
p.35
1 Within 1 hour
Clearing External Flash Custom Functions