Setting The Flash Output Manually For Wireless Flash - Canon EOS 600D Instruction Manual

Other Settings
Setting the Flash Output Manually for Wireless Flash
When [Flash mode] is set to [Manual flash], the flash output can be set
manually. The flash output settings (['_ flash output], [Group A
output], etc.) that can be set will differ depending on the [Wireless
func.] setting (see below).
[W/ireless func.: ;=_]
_ [Firing group: %All]: The manual
flash output setting will be applied to
all the external Speedlites.
_ [Firing group: =_ (A:B)]: You can set
the flash output separately for slave
groups A and B.
[_/ireless rune.: _=_+_-_,_]
_ [Firing group: %All and _]: The
flash output can be set separately for
the external Speedlite(s) and built-in
flash.
_ [Firing group: =_ (A:B) _,_]: You can
set the flash output separately for
slave groups A and B. You can also
set the flash output for the built-in
flash.
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