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04-11-2014, 03:18 AM   #1
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YN560iii mounted won't flash.

Just got my Yongnuo YN560iii delivered there. I can't seem to get it to flash when it's mounted to my KR.

Am I doing something wrong or being a complete noob ? I don't know if I'm missing something obvious or what.

Thanks for any help.

EDIT: Eventually got it to fire. Had to put my shutter to 1/180. It won't fire past this.

Last edited by degnann; 04-11-2014 at 04:17 AM.
04-11-2014, 04:18 AM   #2
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First make sure your shutter speed is not exceeding the sync speed of the flash which i think is about 1/180 of a second. Lower shutter speed to 1/160 or something and test.
04-11-2014, 05:37 AM   #3
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It's to stop you taking a picture of the shutter. The flash you bought doesn't do HSS (neither does the built-in).
04-11-2014, 08:22 AM   #4
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QuoteOriginally posted by degnann Quote
EDIT: Eventually got it to fire. Had to put my shutter to 1/180. It won't fire past this.
That is the expected behavior. Pentax disables the hot shoe if the shutter speed is above the X-sync speed (1/180s). The X-sync speed is the highest shutter speed at which the entire frame is open at once. At higher than the X-sync speed, the following curtain starts its travel before the leading curtain finishes.


12-27-2016, 03:39 PM   #5
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I have a K-S2, and I know the Sync Speed is 1/180. I am happy to have found this post, because I didn't understand why my camera wouldn't trigger the flash @ 1/200 or higher. Now I do. The thing that still puzzles me, however, is that I can't even get 1/180 on my camera. It goes from 1/160 to 1/200. Is that the same for other K-S2 users?

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