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

a: Fully Automatic Wireless Flash Shooting
Flash exposure compensation and other settings set on the master unit 
will also be automatically set in the slave unit(s). You do not need to 
operate the slave unit. Wireless flash shooting with the following 
settings can be performed in the same way as in normal flash shooting.
You can use two or more master units (master units + slave units = 
maximum of 16 units). By preparing multiple cameras with master units 
attached, you can shoot by changing cameras while keeping the same 
lighting (slave units).
Note that when using two or more master units, the color of the <D> 
lamp varies depending on the order in which the power was turned on. 
The first master (main master) is green and the second and subsequent 
masters (sub-masters) are orange.
Using Fully Automatic Wireless Flash
• Flash exposure compensation
• High-speed sync
• FEB (E/p.23)
• Manual flash (p.31, 64)
• FE lock (p.24)
• Stroboscopic flash (p.33)
About Master Units
<@>, <Y> and <E> are displayed when function button 4 is 
If the <D> lamp is red, the connection has not been established. After 
checking the transmission channel and wireless radio ID, turn the power of 
each master unit off, and turn it on.