USED Canon Speedlite Transmitter ST-E2

Transmitter to control slave-set 580EX, 550EX, 430EX, and 420EX units in wireless multi-flash photography using Speedlites 580EX, 550EX, 430EX, and 420EX. Attaches directly to the camera's accessory shoe contacts for use. Features a lightweight and compact design weighing only 100g. Powered by one lithium battery (2CR5). When attached to an E-TTL compatible EOS camera, flash output ratio and multi-flash control are possible with E-TTL auto flash. Settings range from 8:1 to 1:8 in 1/2-stop increments, and control is possible for up to 2 groups. For shooting with different flash outputs for each slave on other EOS cameras, manual settings are required. Also includes a built-in AF-assist beam emitter function compatible with Area AF.