Canon ST-E10 Speedlite Transmitter

No, the ST-E10 is powered directly by the camera.

The maximum range is approximately 30 meters.

The ST-E10 is compatible with Canon EOS cameras featuring a multi-function shoe, such as the R3, R7, and R10.

Compatible Speedlites include the 600EX II-RT (RT Version only), 600EX-RT, 430EX III-RT, and Canon EL-1.

Yes, you can control settings using the Canon Camera Connect app on your smartphone, provided your camera supports it.

Yes, the ST-E10 offers L-series professional weather resistance.

You can control up to 5 independent flash groups.

The transmitter supports second curtain sync with compatible Speedlites.

Check that the ST-E10 is properly mounted on the camera, that the Speedlites are turned on, and that the channels and groups are correctly set. Ensure the flash is within the 30-meter range.

Check the battery levels of the Speedlites. Ensure the flash settings are correctly configured on your camera or in the app.

Ensure the camera's multi-function shoe is clean and free of debris. Restart both the camera and the transmitter.

Reduce obstacles between the transmitter and the Speedlites. Check for interference from other electronic devices.

Ensure the Speedlites are compatible with the ST-E10 and that the camera firmware is up to date.