C: Setting Custom Functions
C.Fn-12: 3(Flash recycle with external power)
0: 1(External & internal power)
Charges in parallel using both internal power and external power.
1:2(External power only)
Internal power is needed to control the Speedlite. By using only external power for charging, you can minimize the depletion of the internal power.
C.Fn-13: 6(Flash exposure metering setting)
0:4(Speedlite button and dial)
1:5(Speedlite dial only)
You can perform flash exposure compensation by directly turning <9>, without pressing the <@> button.
C.Fn-20: 7(Beep)
You can enable a beep to sound when the Speedlite is fully charged, or when a slave unit is fully charged during radio wireless transmission flash shooting.
Note that when set to 1, a beep will sound as a warning when the flash firing restriction is activated due to a temperature increase in the flash head.
0:OFF (Disabled)
1:ON (Enabled)
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