Canon EOS 600D, Instruction Manual, Page: 194 / 328

194
This describes fully-automatic wireless
flash shooting with one external
Speedlite and the built-in flash.
You can change the flash ratio between
the external Speedlite and built-in flash
to adjust how the shadows look on the
subject.
On the menu screens, the <
0
> and
<
1
> icons refer to the external
Speedlite, and the <
3
> and <
2
>
icons refer to the built-in flash.
1
Select [CustWireless].
Follow step 5 on page 192 to select
[
CustWireless ], then press <
0
>.
2
Select [Wireless func.].
For [ Wireless func. ], select [
0
:
3
],
then press <
0
>.
3
Set the desired flash ratio and
take the picture.
Select [
0
:
3
] and set the flash ratio
within 8:1 to 1:1. Setting a flash ratio to
the right of 1:1 (up to 1:8) is not possible.
If the built-in flash output is not
enough, set a higher ISO speed (p.79).
Custom Wireless Flash Shooting
Fully-automatic Shooting with One External Speedlite and
Built-in Flash
The 8:1 to 1:1 flash ratio is equivalent to 3:1 to 1:1 stops (1/2-stop
increments).