18
Autoflash Shooting with Three Slave Groups
You can add firing group C to firing groups A and B. C is
convenient to use as a backlight, so as to eliminate the
subjects shadow. The basic setting method is the same
as ”Autoflash Shooting with Two Slave Groups”.
1. Set a flash as firing group C.
For the slave unit settings,
see the flash instruction manual.
2. Set to < RATIO A:B:C >
Set the master unit to < RATIO
A:B:C > in the same way as steps 2 and 3 on the
preceding page.
3. Set flash exposure compensation as required.
Press function button 3 < GR >, Turn the dial and select
< C >. At this point, according to the parameters in red
group C turn the dial to set flash exposure compensa-
tion and press the “set” button to confirm.
Slave Group Control
You can add up to 15 slaved units in Groups to achieve mas-
terful lighting with precise control from the ST-RT transmitter.
NOTE:
To fire the three firing groups A, B and C at the same
time, set < RATIO A:B:C >. With the < RATIO A:B >
setting, firing group C does not fire.
TIPS
:
The flash ratio of 8:1 to 1:1 to 1:8 is equivalent to 3:1 to 1:1 to
1:3 when converted to number of stops. The details of the
flash ratio settings are as follows:
8: 1 . 4: 1 . 2: 1 . 1: 1 . 1: 2 . 1: 4 . 1: 8
5 .6: 1 2 .8: 1 1 .4: 1 1 :1. 4 1 :2. 8 1 :5. 6
