Canon EOS Rebel T4i Instruction Manual - Page 229

Easy Wireless Flash Shooting Fully Automatic Shooting with Multiple External Speedlites You can have multiple slave units fire as if they were a single Speedlite. This is convenient when you need a large flash output. Basic settings: Flash mode : E-TTL II E-TTL II meter. : Evaluative Built-in flash : EasyWireless Channel : (Same as slave units) All the slave units will fire at the same output and be controlled to obtain a standard exposure. No matter what the slave ID is (A, B, or C), all the slave units will fire as one group. Flash Exposure Compensation If the flash exposure looks too dark or too bright, you can set flash exposure compensation to adjust the slave units' flash output. Select [Flash exposure compensation], then press . If the flash exposure is too dark, press the key to increase the flash exposure and make it brighter. If the flash exposure is too bright, press the key to decrease the flash exposure and make it darker. 229