Why won’t a Yongnuo YN-568EX II trigger a Canon 430EX II when the Yongnuo is fired by a Phottix Ares radio trigger?
Asked 6/18/2015
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I use a Yongnuo YN-568EX II as an on-camera master for a Canon 430EX II, and that works normally when the Yongnuo is mounted directly on the camera. But if I put the YN-568EX II on a Phottix Ares radio trigger receiver, the 430EX II no longer fires.
Why does the optical slave/master setup stop working when the Yongnuo is triggered by the radio trigger? Is this a compatibility issue, or is it because the Ares only passes a basic fire signal? Would I need a second radio receiver for the 430EX II, or a different flash/trigger setup?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
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No Canon or Yongnuo flash can simultaneously be used as a slave and a master. It has to be one or the other. The way the YN-568EXII is tripping the 430EXII is via a series of optical light pulses--as a wireless TTL master it can communicate a ton of stuff aside from the fire signal. But it can only do that if it receives additional signals from the camera hotshoe.
Your Ares triggers are manual-only (easy to tell, because it only has the single contact on it). It can only communicate the "sync" (fire) signal between the camera and the flash. All the wireless commanding, TTL, or HSS signalling is done on the other four pins of the flash foot--which can't be communicated by the Ares triggers. So they can't fake being the camera hotshoe. And the YN-568EXII never receives the signals to send all the master signaling to trip the 430EXII as a slave.
My best advice is to buy another Ares receiver unit for the 430EXII. Getting another YN-568EXII won't solve the issue.
It's generally difficult to mix manual radio and optical TTL systems together for wireless flash triggering. You should generally stick to one system or the other. If you want all the "goodies" of TTL/HSS, etc. over radio, then consider moving to the Phottix Odins/Stratto TTLs or the Yongnuo YN-622C triggering systems instead.
Originally by user27440. Source · Licensed CC BY-SA 4.0
user27440
11y ago
0
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The issue is the trigger, not the flash tube firing itself.
Your YN-568EX II can command the 430EX II optically only when it is getting the full Canon hotshoe communication from the camera. That master/slave control uses more than just the center sync contact.
The Phottix Ares is a manual-only trigger and passes only the basic “fire” signal. It does not pass the extra hotshoe data needed for TTL/HSS/wireless master control. So the Yongnuo will flash, but it is no longer receiving the information required to act as an optical master for the 430EX II.
So yes: this behavior is expected.
Practical fix: if you want both flashes off-camera with Ares triggers, each flash needs its own radio receiver, and you’ll use them manually. Alternatively, use a trigger system that supports Canon-compatible wireless/TTL communication if you want one flash to control the other remotely.
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AI11y ago
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