Yongnuo YN-560 + Yongnuo RF603 triggers + Canon 5D = 1/160 sync speed. Ideas?

<p>Grateful for pointers to what I may have missed.</p>

<p>The set-up:</p>

<p>A single Yongnuo YN-560, set to Manual.<br>

Yongnuo RF-603 transceivers<br>

Canon EOS 5D ("Vintage.") (Not the MK2.)<br>

All batteries are freshly charged.</p>

<p>The result: sync @ 1/160, 1st curtain. The product specs say (at least) 1/200.</p>

<p>Again, grateful for ideas, pointers to threads I missed, and links.</p>

<p>ALL RF triggers introduce a delay between the camera trigger and flash trigger units. This was discussed quite lengthily in <a href="../medium-format-photography-forum/00ZVW6">this thread</a>.</p>

<p>The delay is typically several hundred microseconds and enough to introduce some trailing curtain cutoff with focal-plane shutters. As you've discovered already, the "cure" is to drop the synch speed on the camera slightly.</p>

<p>Incidentally I'd be interested to know if anyone's measured, or has the specification for, the delay introduced by top-end triggers like the PWs. Because I suspect they're actually no better than cheaper triggers in this respect.</p>

<p>Thanks RJ, both your take and point to the thread is a terrific help. Best for the week-</p>

<p>Do a test without the radio triggers by mounting the flash directly on the camera. I have a 5D and RF-602 triggers and get 1/200s sync speed. One caveat is that I need to do the half-press first otherwise max sync speed drops to 1/125-1/160s. </p>

<p>Thanks, Michael. Yeah, did this at setup per instructions and tried again while testing. No help. Per MJ's comment, I'll live with the 'cure.'</p>

<p>Thanks again for the ideas. Appreciate the help-</p>

<p><a href="http://strobist.blogspot.com/2010/01/know-your-sync.html">This blog entry</a> covers the Canon FF camera sync speed inconsistency issue well/</p>