Canon | ST-E3-RT Speedlite Transmitter

The Canon Speedlite ST-E3-RT uses radio frequency technology to control and trigger up to 15 compatible flashguns in three groups. Transmission distance of up to 30 metres in a 360 degree angle. Compatible with Canon wireless radio flashguns such as the Canon Speedlite 600EX-RT model. Supports E-TTL II flash, manual flash, stroboscopic and auto external flash metering. Please note due to the ST-E3-RT not having an optical transmission function, it is not compatible with earlier Speedlite models such as the 580EX II.