Canon ST-E2 Speedlite Transmitter

A master control device for wireless Speedlite flash system. Meets professional and advanced amateur standards. Its dedicated transmitter controls up to 3 Canon 550EX Speedlites as slave units 33ft. away outdoors and 49.5ft. away indoors. It is mounted as a clip-on with shoe lock lever and locking pin. @@ Type: 550EX-dedicated, clip-on Speedlite transmitter with direct contacts @@Compatible Cameras: Type A EOS cameras (E- TTL, autoflash); Type B EOS cameras (Manual flash) @@ Channels: 4 @@Flash Ratio Control: For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps @@ High- Speed Sync (FP flash): Enabled with high-speed sync mode @@Slave Operation Confirmation: With test transmission button. *Slave A fires followed by slave B at 1/64 output. @@Flash Exposure Confirmation: 1. Before flash fires during FE lock Adequate flash exposure indicated by the flash exposure level icon lit in the viewfinder. Insuf ficient flash exposure indicated by the flash exposure level icon blinking in the viewfinder.

With the Speedlite 550EX and the Speedlite Transmitter ST-E2, it is now possible to use multiple Speedlites under full E-TTL control and without the need for any interconnecting wires. Developed in conjunction with the Speedlite 550EX and the EOS-3 camera, this master control device for a wireless Speedlite flash system meets professional and advanced amateur standards. Its dedicated transmitter controls up to 3 Canon 550EX Speedlites as slave units 33ft. away outdoors and 49.5ft. away indoors. It is mounted as a clip-on with shoe lock lever and locking pin. Models: 550ex, 420ex off camera. Battery not included.