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New Contributor
Posts: 1
Registered: ‎02-07-2018

ST-E3-RT not firing groups simultaneously?



I have two 600EX-RT on my ST-E3-RT. 


When both flashes is set to group A, they fire simultaneously.


If I set one flash to group A and another to group B, then group B flashes a half second later.


Can't figure out if I touched a setting on the ST-E3-RT. I've tried clearing it, but it is the same.


Any idea?



Respected Contributor
Posts: 1,119
Registered: ‎02-06-2013

Re: ST-E3-RT not firing groups simultaneously?

Can you specify what modes and what the settings are?  That will help narrow it down.

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