Canon ST-E2

This small, light and portable device ST-E2 is an infrared transmitter for controlling two groups of remote Speedlite wireless flash units. It can also be used as a secondary light source for low-light focusing.The ST-E2 transducer cooperates with the E-TTL II flash system and ensures accurate and consistent exposure to wireless flash units in all situations. Under complex lighting conditions, exposure compensation is used to provide greater light output control.
By controlling the ratio, you can control the ratio of the light output of the two flash units to achieve creative results. The controls of the ratio range from 1:8 to 8:1 for two Speedlite groups provide a wide range of settings. High-speed sync lets you sync the flash at shutter speeds that are higher than the maximum camera sync speed. This allows you to take photos with a slight shadow even in bright daylight, making use of faster base lenses.When used in buildings, the ST-E2 provides a working range of up to 15m. When used outside the building, the range is up to 10m.
Parameters and Specifications:
Flash modes:Automatic E-TTL II / E-TTL exposure controlHigh Speed ??Sync (FP) Yes
Flash Features:
Flash exposure lock
Wireless flash:
Transmitter
Transmitter type: Infrared
Approximate maximum transmitter range: in buildings: 12 to 15m
Outside the building: 8 to 10m
Number of groups: 2
Number of Channels: 4
Auto Focus Assist:
AF-assist light
Number of supported AF points: 1 - 45
Assistant Light Type: AF Infrared
Power source:
Battery 1 × 2CR5
Minimum charging time: Approx. 1s
Construction:
Material of the fixing socket Plastic
Other functions:
Compatible accessories: EX-Speed ??Speedlite flash unit with sub unit function
Size and weight:Size (W × H × D): 62 × 51 × 80mmWeight (excluding batteries): 100g