Production Description:This OC-E3/S is a good accessory used to achieve off-camera flash photography works without the harsh shadows behind the subjects, or achieve special lighting for the subject.Fully work on E-TTL mode.There is a built-in tripod socket at the opposite side where the Speedlite unit is mounted. Suitable for:Cameras: All Canon EOS Cameras and G series cameras, except the 630 and RT cameras.Flashes: All Canon EX/EZ series speedlites, including: 580EX II, 580EX, 550EX, 540EZ, 480EG, 430EX, 430EZ, 420EX, 420EZ, 380EX, 300EZ, 220EX.