Canon EOS R50 Mirrorless Camera (White) - Manual (Page 167)

External Flash Custom Function Settings
For details on the external Speedlite's Custom Functions, refer to the Speedlite's Instruction
Manual.
1.
Select [External flash C.Fn setting].
2.
Set the desired functions.
Select the number.
Select an option.
Caution
With an EL/EX series Speedlite, the Speedlite will always fire at full output if the
[
Flash metering mode ] Custom Function is set to [ 1:TTL ] (autoflash).
Setting or clearing Speedlite Personal Functions (P.Fn) is not possible from the
camera's [
: External flash func. setting ] screen. Set it directly on the
Speedlite.
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