Canon EOS 90D, Instruction Manual

Page: 396 / 888

184
Wireless Flash Photography Using Optical Transmission
Autofl ash With One Receiver
You can adjust how shadows form on
subjects by changing the ratio of fl ash
output from a receiver and a sender.
1
Set [Wireless func.] to [
0
:
3
].

Set
[Wireless func.]
to
[
0
:
3
]
as
described in step 5 on
=
183.
2
Set the ratio of fl ash output of the
external Speedlite to the built-in
fl ash.

Select
[
0
:
3
]
and set the fl ash ratio
within 8:1 to 1:1.
o
If there is insuffi cient fl ash output from the sender, increase the ISO speed
(
=
213).
o
Flash ratios from 8:1 to 1:1 correspond to 3:1 to 1:1 (in 1/2-stop increments)
when converted to number of stops of exposure.