The Canon Speedlite Transmitter ST-E3-RT is a weatherproof radio-frequency flash trigger for reliable off-camera flash control. With the ST-E3-RT, photographers can control compatible Canon Speedlite flashguns - such as the new 600EX-RT - over distances up to 30m, even without direct line of sight. Additionally, the transmitter can also be used for camera triggering - any EOS camera fitted with a Canon ST-E3-RT can be triggered from a second unit or from a compatible Speedlite flashgun. Part of the E-TTL II flash system, the Canon Speedlite Transmitter ST-E3-RT features an easy to read back-lit LCD control screen and is powered by two AA/LR6 batteries.
Canon Press Release
Canon Speedlite Transmitter ST-E3-RT
Fire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.
* Radio frequency remote flash trigger
* Fire selected Speedlites from 30m away
* Part of the E-TTL II flash system
* Controls up to 15 flashguns
* Remote camera triggering
* Weather sealed against dust and moisture.
A radio-frequency flash trigger aimed at professional photographers using off-camera flash.
Reliable off-camera flash control
Control compatible Canon Speedlite flashguns over distances up to 30m. 2.4GHz radio frequency triggering operates reliably, even when shooting outdoors and around corners – direct line of sight not required.
Multiple flash photography
Create intricate multi-flash lighting set ups, triggering up to 15 Speedlite flashes with a single camera-mounted Speedlite Transmitter ST-E3-RT. E-TTL II flash metering makes exposure control easy.
Remote camera control
Trigger an EOS camera fitted with a Speedlite Transmitter ST-E3-RT from a second unit or from a compatible Speedlite flashgun, such as the Speedlite 600EX-RT. Up to 15 cameras can be triggered at once, for synchronised shooting.
Easy to use design
The Speedlite Transmitter ST-E3-RT is sealed against dust and moisture to the same degree as professional EOS cameras and L-series lenses. It features an easy to read back-lit LCD control screen and is powered by two AA/LR6 batteries.
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