Canon ST E2 - wireless flash system control

Canon is an industry leader in professional and consumer imaging equipment and information systems. Canon's extensive product line enables businesses and consumers worldwide to capture, store and distribute visual information. Cannon provides a wide range of accessories that are fully tested and 100% compliant with the corresponding equipment. All accessories are noted for their high reliability and superior quality.PRODUCT FEATURES: 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; Flash exposure confirmation; Wireless slave SE mode cancellation; Wireless Transmission: Infrared pulse; Transmission Coverage: �40 degrees horizontal and �30 degrees vertical; AF-assist Beam: Compatible with EOS-3's 45-point Area AF and 28mm and longer lens focal lengths; AF-assist Beam Effective Range: Approx. 0, 6 to 10 m/2.0 to 16.5 ft along the periphery (in total darkness); SE Feature: While the power switch is set to I or HOLD, the transmission turns off automatically after about 90 sec. of non-use.  more