The Canon Speedlite Transmitter ST-E2 is a wireless transmitter that can control up to two Speedlite 550EX groups set as slaves. The transmitting range is about 12 to 15 meters / 39.4 to 49.2 ft indoors and 8 to 10 meters / 26.2 to 32.8 ft outdoors. With Type A cameras, the ST-E2 can execute various operations through wireless control, including autoflash, high-speed sync, FE lock, flash exposure compensation, manual flash, and multi-flash firing. With Type H cameras, the ST-E2 can only be used for manual flash and multi-flash photography.
The ST‑E2 is a wireless Speedlite transmitter that can control up to two Speedlite 550EX groups and works with Canon Type A EOS cameras for E‑TTL, high‑speed sync, flash exposure compensation and more. It operates within a range of about 12‑15 m indoors and 8‑10 m outdoors, and offers channel selection, flash‑ratio control, and a Save‑Energy feature.
The manual explains how to install the lithium 2CR5 battery, attach the unit to the camera hot shoe, select channels, and use the various flash functions. It also includes specifications, FCC compliance information, and troubleshooting tips for reliable wireless operation.
| Indoor transmitting range | 12 to 15 meters (39.4 to 49.2 ft) |
|---|---|
| Outdoor transmitting range | 8 to 10 meters (26.2 to 32.8 ft) |
| Battery type | Lithium 2CR5 |
| Number of selectable channels | 4 |
| Maximum Speedlite groups controlled | Two |
It can control up to two Speedlite 550EX groups.
The ST‑E2 uses a single lithium 2CR5 battery.
Press the
The indoor range is about 12 to 15 meters (39.4 to 49.2 ft).