- Wireless flash controller for the Canon EX430 and 580EX II - 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
The Canon ST-E2 Wireless Transmitter 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 580 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.
A light source emitted either from a camera or external flash unit that helps a camera to obtain accurate autofocusing results in low-light conditions. The light will not impact the resulting exposure as it deactivates before the image is captured.