Canon EOS 70D Operation Manual - Page 210
Set [Firing group] to, A:B]., Set the desired flash ratio and, take the picture.
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Using Wireless FlashN [1 (A:B)] Multiple slave units in multiple groups Divide the slave units into Groups A and B and change the flash ratio to obtain the desired lighting effect. Refer to your Speedlite's instruction manual to set one slave unit's slave ID to A (Group A) and the other slave unit's A B ID to B (Group B) and position them as shown in the illustration. 1 Set [Firing group] to [1 (A:B)]. 2 Set the desired flash ratio and take the picture. Select [A:B fire ratio] and set the flash ratio. If [Firing group] is set to [1 (A:B)], Speedlites with slave ID:C (Group C) will not fire. The 8:1 to 1:1 to 1:8 flash ratio is equivalent to 3:1 to 1:1 to 1:3 stops (1/2stop increments). 210
Using Wireless Flash
N
210
[
1
(A:B)] Multiple slave units in multiple groups
Divide the slave units into Groups A and
B and change the flash ratio to obtain
the desired lighting effect.
Refer to your Speedlite’s instruction
manual to set one slave unit’s slave ID
to A (Group A) and the other slave unit’s
ID to B (Group B) and position them as
shown in the illustration.
1
Set [Firing group] to [
1
(A:B)].
2
Set the desired flash ratio and
take the picture.
Select [
A:B fire ratio
] and set the
flash ratio.
A
B
If [
Firing group
] is set to [
1
(A:B)
], Speedlites with slave ID:C (Group C)
will not fire.
The 8:1 to 1:1 to 1:8 flash ratio is equivalent to 3:1 to 1:1 to 1:3 stops (1/2-
stop increments).