With the Canon ST-E3-RT Speedlite Transmitter you can fire compatible Speedlite flashguns such as the Canon 600EX-RT over distances of up to 30m. Radio-frequency control in the 2.4GHz range provides reliable operation even when direct line-of-sight is not possible. Create multi-light setups controlling up to 15 flashguns with a single camera-mounted ST-E3-RT. And full E-TTL II flash metering makes exposure control easy. Remote triggering* of the camera’s shutter is also possible with the ST-E3 and a 600EX-RT flash unit. The ST-E3-RT is also weather sealed against dust and moisture making it ideal for professional photographers who require a weatherproof radio trigger solution for when using off-camera flash.
* With a shoe-mounted ST-E3-RT and 600EX-RT when used with the EOS 5D Mark III or EOS 1Dx. Other compatible EOS DSLR’s with an N3 remote connection will require an optional SR-N3 Release Cable.
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.
Weatherproof 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.
Speedlite Transmitter ST-E3-RT
Auto exposure control High speed sync (FP) Manual / output settings Manual steps Strobe / output settings Frequency