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Wireless Flash Shooting: Radio TransmissionThis chapter describes wireless flash shooting using radio transmission.

For the accessories required for radio transmission wireless shooting, see the system map (p.104). For the regions of use, restrictions, and precautions related to radio transmission, refer to the separate leaflet.

When using a Speedlite 600EX (without radio transmission function), the shooting in this chapter is not available. To shoot with optical transmission wireless flash, see Chapter 5 (p.75).

When the camera’s shooting mode is set to a fully automatic mode or an Image Zone mode, the operations in this chapter are not available. Set the camera’s shooting mode to V/X/W/q5/ (Creative Zone mode).

The 600EX-RT attached to the camera is called the master unit, and a 600EX-RT that is wirelessly controlled is called the slave unit.

You can also wirelessly control the 600EX-RT set as the slave unit with the Speedlite Transmitter ST-E3-RT (sold separately). For details on setting the master unit functions, see the transmitter’s instructions.

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