Flash Custom Function Settings
For details on the Speedlite’s Custom Functions, refer to the Speedlite’s instruction manual
Clearing Flash Custom Function Settings
Selecting [Clear all Speedlite C.Fn’s] will clear all the Speedlite’s Custom Function settings (except [C.Fn-00: Distance indicator display]).
With an EX-series Speedlite, if the [Flash metering mode] Custom Function is set to [TTL] (autoflash), the Speedlite will always fire at full output.
The Speedlite’s Personal Functions (P.Fn) cannot be set or canceled with the camera’s [External Speedlite control] screen. Set it with the Speedlite