Canon Speedlite Transmitter ST-E3-RT Instruction Manual - Page 51

Transmitter Control from Camera's Menu Screen Settings Available in [Flash function settings] EOS digital cameras released since 2012 When using the transmitter with cameras such as EOS-1D X, you can set the functions for "Radio transmission wireless shooting" in the [Flash function settings] screen. EOS digital cameras released from 2007 to 2011 When performing "Radio transmission wireless shooting", set the functions by operating the transmitter. The settable functions are as follows. The available settings vary depending on the flash mode or wireless function setting. Function Reference Page Flash firing Enable / Disable E-TTL II flash metering Evaluative / Average Flash synchronization speed in Av mode Flash mode E-TTL II (autoflash) / Manual flash / MULTI flash / Individual group control p.50 Shutter synchronization 1st curtain / High-speed Flash exposure compensation FEB Wireless functions (setting) Radio transmission wireless p.51 Clear Speedlite function settings [Flash firing] and [E-TTL II flash metering] are displayed in step 2 or step 3 on the preceding page (depending on the camera). When [Flash sync. speed in Av mode] is not displayed, it can be set with the camera's Custom Function. 49