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12-23-2014, 10:26 AM   #1
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wireless flash on Kx

I just discovered my Kx has a wireless flash setting. I have a Yongnuo 560iii which I set to channel 1 and had the radio waves showing, and on S1 mode. I set the camera to wireless flash, it said channel 1 too. I put it in manual and the 560 does nothing when I hit the shutter button. Is that because the wireless only works with dedicated flashes? Or am I missing something else?

12-23-2014, 11:03 AM - 2 Likes   #2
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Those are two different kinds of "wireless flash". The K-x communicates with compatible (dedicated) flashes via a pulse burst from the onboard flash.

The YN-560 has two "wireless" modes, neither of which are the same as the K-x. The primary mode uses a radio receiver to trigger the flash - this requires a transmitter on the camera, like an RF-603II or a YN560-TX. The other mode is as an optical slave, but it just fires when the flash on the camera fires, with no other communication between them. If the camera fires a pre-flash to measure exposure, in S1 mode, the YN-560iii will trigger on that and fire at the wrong time. In S2 mode, it waits for a second flash.

Last edited by THoog; 12-23-2014 at 02:25 PM.
12-23-2014, 08:48 PM   #3
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In addition to what Todd said, make sure you set the on-board flash of your Kx to a "standard" PTTL mode, not Wireless PTTL. Wireless PTTL is a completely different protocol, with actually several rapid-fire signalling flashes. You can dial the on-board flash compensation back a bit so that it doesn't overpower your subject, provided the Yongnuo can still see the flash pulses.

With the Kx in normal PTTL flash mode, and the external flash in S2 mode (to ignore the pre-flash), you should be able to get some results.

Depending on the circumstances, you might actually be able to get the Yongnuo to work for you in S1 (dumb) mode. I do something similar to fire external flashes with my MX-1 or X-90, which do not have a hotshoe. I don't have any optical triggers that have a pre-flash suppression mode. But that is another topic.

Anyhow, whatever route you take with the Yongnuo, just turn off the Wireless flash mode on the Kx body.
01-01-2015, 04:16 PM   #4
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Thanks all, I'll keep experimenting

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