Can a Canon Speedlite 430EX III-RT trigger a 430EX II?

Asked 12/26/2016

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I’m trying to use a Canon Speedlite 430EX III-RT to trigger a 430EX II off camera. They don’t seem to connect. Can the 430EX III-RT trigger the 430EX II directly, and if not, what setup would work instead?

canon wireless-flash off-camera-flash speedlite flash

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

9y ago

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No. The presence of a radio receiver in the flash is denoted by the RT in the model name. Models without an RT in their name do not have radio receivers.

You can either:

Attach a radio receiver to the EX II flash. The Yongnuo YNE3-RX is such a receiver that is compatible with the 480EX II, 580EX II, YN568EX II, and other E-TTL capable flashes.

Use a master flash with optical communication to the off camera flash. Unfortunately the EX430 III-RT is not capable of being an optical master, only a radio master. If you have a 580EX II you can use it as an optical mater to trigger the 480EX III-RT optically, but not by radio.

Originally by user15871. Source · Licensed CC BY-SA 4.0

user15871

9y ago

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No. The 430EX III-RT can only use Canon’s built-in radio system with flashes that have "RT" in the model name. A 430EX II does not have an RT radio receiver, so it cannot be triggered directly by the 430EX III-RT over radio.

Options that do work:

Add a compatible external radio receiver to the 430EX II.
Use Canon’s optical wireless system instead—but the 430EX III-RT cannot act as an optical master, only a radio master.

So if your goal is to trigger a 430EX II, the 430EX III-RT alone won’t do it. You’d need either an external receiver on the 430EX II, or a different optical master flash/controller that supports Canon optical wireless.

Can a Canon Speedlite 430EX III-RT trigger a 430EX II?

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