Canon Speedlite 600 EX-RT User Manual (en, zh)

a: Fully Automatic Wireless Flash Shooting
When you need more flash output or you 
want to perform lighting more easily, you 
can increase the number of slave units 
and fire them as a single flash.
To add slave units, use the same 
procedure as “Autoflash Shooting Using 
One Slave Unit”. Set A, B or C as the 
firing group. The flash will not fire if it is 
set to D or E.
When the number of slave units is 
increased or master flash firing set to 
ON, automatic control is performed to 
fire all flashes at the same flash output 
and ensure that the total flash output 
results in the standard exposure.
Autoflash Shooting Using Multiple Slave Units
If the <D> lamp is red, radio transmission has not been established.  
Check again the transmission channels and wireless radio IDs of the master 
unit and slave unit. If you cannot connect with the same settings, turn the 
power off and on again.
The master/slave flash coverage is set automatically to 24 mm. You can 
also set the flash coverage manually.
You can press the depth-of-field preview button on the camera to fire the 
modeling flash (p.38).
When the Speedlite is set as the master unit, the time until auto power off 
takes effect is 5 min.
If the slave unit’s auto power off takes effect, press the master unit’s test 
flash button (p.16) to turn on the slave unit. Note that the test flash cannot 
be fired while the camera’s metering timer is operating.
The autoflash system (E-TTL II/E-TTL) depends on the camera used and 
is set automatically. Note that <a> is displayed on the LCD panel for 
both systems.
You can change the time until the slave unit’s auto power off takes effect 
You can enable a beep to sound when the charge of all the slave units is 
complete (C.Fn-20/p.99).
You can set it up so that the AF-assistant beam emitter will not blink when 
the slave unit recycling is completed (C.Fn-23/p.100).