Product Description

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.

Product Details

• Brand: Canon
• Model: ST-E2
• Dimensions: 2.60" h x 3.40" w x 5.00" l, .55 pounds

Features

• Wireless flash controller for the Canon EX420 and EX550
• Indoor transmission range of approximately 40 to 50 feet
• Outdoor transmission range of approximately 26 to 33 feet
• 1,500-transmission battery life
• Turns off after 90-second idle

Amazon.com Product Description
The Canon Speedlite Transmitter ST-E2 is compatible with Type A EOS cameras (E-TTL, auto flash) and Type B EOS cameras (manual flash). The ST-E2 is designed to control slaved Canon 550 EX flashes, enabling simultaneous flash use in professional settings. The wireless controller has a flash ratio control, allowing for several different A:B ratios, 1:8 to 8:1 in half-step increments, as well as slave confirmation via a test transmission button, which sets off slave A, followed by slave B, at 1/64 output.