Small, lightweight and portable, the ST-E2 is an on-camera infra-red transmitter capable of controlling up to two slave groups of remote wireless slave Speedlites. The Transmitter works with the E-TTl II flash metering system to ensure wireless flash exposures are accurate and consistent in all situations. It also provides wide-ranging control over the ratio of light output of two groups of flashguns.
When shooting in low light conditions, the ST-E2 can emit a focusing beam to ensure sharp results. This beam aids focusing and covers all focusing points on all EOS cameras.
Inside: 12m - 15m
Outside: 8m - 10m
Suitable for Speedlites 600EX-RT, 600EX, 580EX II, 580EX, 550EX, 430EX II, 430EX, 420EX, 320EX and 270EX II.
The ST-E2 does not provide any flash illumination.