Canon 550EX Speedlite TTL Shoe Mount Flash

A professional flash for the EOS-system, the 550EX offers every feature supported by the every EOS series camera in a package of exceptional workmanship. Full manual control of flash output is possible, or use the TTL flash capabilities of the camera it is mounted on. Combined with the optional ST-E2 Wireless Transmitter, multiple 550EX's can be combined to achieve a studio-like TTL effect.