Canon EOS 7D - Manual (Page 129)

129
Using Wireless FlashN
[1 (A:B C)] Multiple slave units in multiple groups
This is a variant of the [1
(A:B)] setup on the preceding
page. This setup has group C
eliminate the shadows
created by groups A and B.
Refer to your Speedlite’s
instruction manual to set the
slave ID of the three slave units
to A (Group A), B (Group B),
and C (Group C) and position
them as shown in the
illustration.
1
Set [Firing group] to [1 (A:B C)].
2
Set the desired flash ratio and
shoot.
Select [A:B fire ratio] and set the
flash ratio.
Set flash exposure compensation for
group C as necessary.
A B
C
80
o
Approx. 7m
(23.0ft.)
Approx.
5m (16.4ft.)
Approx.
7m
(23.0ft.)
Approx. 10m
(32.8ft.)
Indoors
Outdoors
If [Firing group] is set to [1 (A:B)], group C will not fire.
If group C is pointed toward the main subject, overexposure may result.