Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 177)

177
Flash Function Settings
 Flash exposure bracketing
External Speedlites equipped with fl ash
exposure bracketing (FEB) can change the
external fl ash output automatically as three
shots are taken at once.
External Flash Custom Function Settings
For details on the external Speedlite’s
Custom Functions, refer to the Speedlite’s
Instruction Manual.
o With an EL/EX series Speedlite, the Speedlite will always fi re at full output if
the [Flash metering mode] Custom Function is set to [TTL fl ash metering]
(autofl ash).
o The external Speedlite’s Personal Function (P.Fn) cannot be set or canceled
from the camera’s [
z
: External Speedlite control] screen. Set it directly on
the external Speedlite.