I have an ST-E3-RT with two Speedlite 430 EX III-RT's.
This works great from behind the camera to control the power output of each speedlite. However, there are ocasions when I need to change the flash power on the speedlite's when being away from the camera.
Can I select the power individually on each of the speedlite's without using the ST-E3-RT?
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I don't think so.
What I have done in the past (more for just a workaround of going beyond the five group limitation) is to add ND gels to flashes as needed.
But outside of zoom (which cannot be done via the ST-E3-RT), I control all other settings with it from the camera.
I have just purchased a Canon R6 and a Speedlite 430EX III-RT, and also own a 430EXII and a Speedlite Transmitter ST-E2.
Is there a way of getting both flashes to work with the R6, either using the master/slave function, or firing both from the ST-E2?
I can get to ST-E2 to fire the 430 EXII but not the 430 EXIII-RT