The Canon Speedlite Transmitter ST-E3-RT is a new waterproof flash trigger that enables photographers to control compatible Canon Speedlite flashguns over distances up to 30-meter. The device uses a 2-way radio wave communication for enhanced communication between master and slave units. The Canon Speedlite Transmitter ST-E3-RT supports E-TTL II flash, manual flash, stroboscopic and auto external flash metering.
TechFresh, Canon Speedlite Transmitter ST-E3-RT
