Canon EOS 7D - Manual (Page 125)

125
Using Wireless FlashN
5
Select [Wireless func.].
For [Wireless func.], select [0],
then press <0>.
X Under [Wireless func.], [Channel],
etc., will be displayed.
6
Set [Channel].
Set the channel (1-4) to the same one
as the slave unit.
7
Fire a test flash.
After checking that the slave unit is
ready to fire, go to the screen in step
5 and press the button.
X The slave unit will fire. If it does not
fire, check your settings again
(p.123).
8
Take the picture.
Set the camera and take the picture
as you would with normal flash
shooting.
To terminate wireless flash shooting,
set [Wireless func.] to [Disable].
Test flash can also be used to wake up slave units from auto power off.
Setting [E-TTL II] to [Evaluative] is recommended.
If you use only one external Speedlite, the [Firing group] setting does
not have any effect.
The slave unit is controlled by the built-in flash’s light pulse signal.
Wireless flash will not work if the [Flash mode] is set to [MULTI flash].