I contacted Olympus' pro tech support earlier this week with a question. (BTW, they are a remarkable support team, very professional indeed) My question? With my EM-5 sync speed set to 1/250th, only the new included clip-on flash will sync to that 1/250th speed. Both my FL50R and FL36R sync slower. 1/160 for the FL50R, 1/200 for the FL36R. I initially thought this was a bug and contacted support with the question. Today, I got a call back from their team with clarification and confirmation of what I'd observed. Turns out there are indeed different sync speed limits for each flash. Apparently based on the power of the flash, the sync speed is limited to slower numbers than what the camera is ultimately capable of. He suggested using FP mode for faster shutter settings, a feature I love and use a lot. The tech agent also mentioned that Olympus would be updating their website to point out the discrepancy. My guess is that any newer OLY flashes will be supporting the faster sync speed.