Speedlite EL-10 not syncing with Speedlite Transmitter ST-E10

GaryFried — Sun, 29 Mar 2026 22:26:49 GMT

I have a Canon R8 and Speedlite EL-10. Just purchased a Speedlite Transmitter ST-E10 and followed all the instructions to sync them, many times. But they are not syncing. Not sure what the issue is.

Any help is appreciated.

Thanks

Gary

Re: Speedlite EL-10 not syncing with Speedlite Transmitter ST-E10

p4pictures — Fri, 08 May 2026 09:09:44 GMT

I have the same transmitter and used it successfully on my EOS R6 Mark II and EOS R10 with multiple Speedlite 600EX-RT, 430EX III-RT, EL-5 and EL-10.

I would try the following to get them setup and working.

Check the firmware version of the transmitter, latest is version 1.2.0, upgrade if necessary.
Set the ST-E10 to channel 1 and set the ID to a four digit number that is not 0000 - do this from the camera menu for external flash settings
Set the EL-10 to receiver mode using the buttons on the flash
Set the EL-10 to channel 1 and the same ID as you have set for the transmitter

At this point the Green LINK light should illuminate on both ST-E10 and EL-10.

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Speedlite EL-10 not syncing with Speedlite Transmitter ST-E10

Re: Speedlite EL-10 not syncing with Speedlite Transmitter ST-E10