Firing multiple flashes

[ToddG1]

How do I fire the 430EX II and two 430EX III-RTs using my ST-E3-RT on my 80D?
I can fire my RTs but want to figure out adding the 430EX.

[Anonymous]

You will not be able to fire the 430EX II using the ST-E3-RT on the camera. The 430EX II can only be an optical slave flash. The ST-E3-RT does not support optical remote operation. You could use the pop up flash on the 80D to fire all your flashes in the optical wireless mode, though.

[diverhank]

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@ToddG1 wrote:
How do I fire the 430EX II and two 430EX III-RTs using my ST-E3-RT on my 80D?
I can fire my RTs but want to figure out adding the 430EX.

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To add the 430EX II, you need an adaptor.   Canon does not make one but Yongnuo does and it works fine.  Look for the

Yongnuo YNE3-RX Wireless Flash Receiver.  It's under $40.