Your wireless radio setup options ... INITIAL WIRELESS RADIO FLASH SETUP ... transmission channels and wireless radio IDs. ... hold down the Wireless Flash Button until ... ... hold down the Wireless Flash Button until ... ... four-digit wireless radio ID: ... the AF- assist beam emitter on ... 1. Flash coverage is set to 24mm by default when the Speedlite 600EX-RT is set for wireless operation. ... MANUAL WIRELESS FLASH ... 2. On the Speedlite Transmitter ST-E3-RT , use the Mode button to set the flash mode to <M>.
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