Canon ST-E3-RT V3 Speedlite Transmitter

Creative lighting and sophisticated remote flash photography is made easy with the Speedlite Transmitter ST-E3-RT (Ver.3): fire multiple flashes at once, and control settings from a distance. Multiple cameras can be triggered from a distance for synchronised shooting.

The ST-E3-RT (Ver.3) allows for off-camera flash control over distances up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.

Key Features

- 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

- Second curtain sync, down to 1/8192 power and FE memory for EL-1 and EL-5

Reliable off-camera flash control

Control compatible Canon Speedlite flashguns over distances up to 30m. The 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 (Ver.3). E-TTL II flash metering makes exposure control easy.

Remote camera control

Trigger an EOS camera fitted with a Speedlite Transmitter ST-E3-RT (Ver.3) from a second unit or from a compatible Speedlite flashgun, such as the Speedlite 600EX II-RT. Up to 15 cameras can be triggered at once, for synchronised shooting.

Easy to use design

The Speedlite Transmitter ST-E3-RT (Ver.3) 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.

Wireless second curtain sync

The Speedlite Transmitter ST-E3-RT (Ver.3) supports wireless second curtain sync for the Speedlite EL-1 and Speedlite EL-5 when fired remotely, plus down to 1/8192 nuance lighting and flash exposure (FE) memory.