Can a Yongnuo RF-603 II trigger a Canon 550EX as an optical master for a 430EX slave?
Asked 3/3/2015
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I have Yongnuo RF-603 II triggers, a Canon 550EX, and a Canon 430EX. I wanted to fire the 550EX remotely with an RF-603 II and have it act as an optical master to trigger the 430EX in slave mode. But when the 550EX is fired by the RF-603 II, it seems to lose its master function. Is there any workaround, or do I need a different 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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The RF-603's are very simple triggers -- no E-TTL whatsoever, including pass-through to the hotshoe on the top of the 603. In your case, you should still be able to put a 603 on your camera's hotshoe, then either flash on top of the 603, with the other flash mounted on the other trigger. Set both flashes to manual power and zoom, then press the shutter on your camera. The RF-603 understands "flash NOW!" in this mode, and that's about it.
In many cases, this is all you really need from a flash trigger, so there's a niche for these super-affordable, super-portable triggers, but if you need more functionality, Yongnuo's YN-622C adds E-TTL and HSS support, which might be what you're looking for.
Originally by user269. Source · Licensed CC BY-SA 4.0
user269
11y ago
0
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No. The RF-603 II is a simple manual trigger: it only sends a basic “fire now” signal and does not pass Canon E-TTL/master-slave communication.
Also, the 550EX cannot be both an off-camera radio-triggered slave and an optical master at the same time. Canon flashes like the 550EX can act as an optical master when on-camera (or via a TTL cord), or as an off-camera slave, but not both simultaneously.
So your planned setup won’t work with RF-603 II units.
What will work:
- Use one RF-603 II on the camera as transmitter.
- Put one RF-603 II under the 550EX.
- Put another RF-603 II under the 430EX.
- Set both flashes to manual power.
If you want to keep Canon optical master/slave control, use an on-camera Canon-compatible master such as a TTL-capable master device instead of the RF-603 II. If you want radio triggering with more advanced flash control, you’d need TTL-capable triggers rather than RF-603 II.
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