Do I need one or two YN-622C units to use a YN-568EX II off-camera with a Canon 550D?
Asked 8/15/2013
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I want to use a Yongnuo YN-568EX II off-camera with my Canon 550D. I know one YN-622C can go on the camera hot shoe, but does the flash have a built-in receiver, or does it also need a second YN-622C attached to it? If there are optical wireless options instead, how do they work with the 550D?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
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Update: Apparently the review I found was simply 100% incorrect or perhaps it was for the first version and I missed it. As Michael Clark was kind enough to point out, it appears that the YN-622C does in fact have wireless optical sync master capability though it does not have radio sync. You only need two of the YN-622Cs if you want to radio trigger.
Originally by user11392. Source · Licensed CC BY-SA 4.0
user11392
13y ago
0
Generated from our catalog & community — verify before relying on it.
For radio triggering, you need two YN-622C units: one on the 550D and one attached to the YN-568EX II. The YN-568EX II does not have a built-in radio receiver.
The flash does include optical wireless options:
- Canon optical master/slave support
- S1/S2 dumb optical slave modes
With a 550D, the built-in pop-up flash is not a Canon optical master, so it can’t directly control the YN-568EX II in Canon optical TTL mode. To do that, you’d need a separate optical master on the camera hot shoe.
However, you can still use the YN-568EX II as a simple optical slave:
- S1: fires on a manual flash burst
- S2: ignores the E-TTL preflash and fires on the main burst
So the practical answer is:
- Radio off-camera: 2 x YN-622C
- Simple optical slave: no YN-622C required, depending on how you trigger it
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AI13y ago
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