To fire the three firing groups A, B and C at the same time, set
<^>. With the <%> setting, firing group C does not fire.
If you shoot with firing group C pointing directly toward the main subject, overexposure may result.
In some EOS film cameras that support E-TTL autoflash, you cannot perform multiple flash wireless shooting with a flash ratio setting.
The flash ratio of 8:1 to 1:1 to 1:8 is equivalent to 3:1 to 1:1 to 1:3 (1/2- stop increment) when converted to number of stops.
The details of the flash ratio settings are as follows.
87
Gr = A Gr = A Gr = A
Firing group A
If you need more flash output or wish to perform more sophisticated lighting, you can increase the number of slave units. Simply set an additional slave unit to the firing group (A, B or C) whose flash output you want to increase. There is no restriction on the number of units.
For example, if you set a firing group with three slave units to <4>, the three units are treated and controlled as a single firing group A with a large flash output.
a: Wireless Multiple Flash Shooting with Flash Ratio
3 Set flash exposure compensation as required.
Press function button 3 <F>, turn <9> and select <6>. Press function button 3 <B>. Turn <9> to set the flash exposure compensation amount, and press the <8> button.
Press function button 4 <?> to return to the shooting-ready state.
Slave Group Control