Canon Speedlite Transmitter ST-E3-RT mirrorless known for its balance between

known for its balance between performance and portability

The Phase One Auto Extension Rings supports all Phase One

thanks to its silent autofocus

2 stops (e

Canon Speedlite Transmitter ST-E3-RT mirrorless known for its balance betweenThe Canon ST E3 RT provides you with seamless control over your creative flash photography. Radio frequency control provides reliable operation even when direct line of sight is not possible. The ST E3 RT makes complex lighting setups simple by facilitating radio controlled, two way wireless transmission up to 98. 4' away, among up to five groups or fifteen individual Speedlites! The ST E3 RT represents the next generation in wireless flash systems.