Quote Originally Posted by CGW View Post

What? Just stay at or below your camera's synch speed.

What he is saying is that if you are hard wired to your strobe, you can operate up to 1/500th with a leaf shutter.

If you introduce a transmitter/receiver, the signal from one to the other may prohibit you from going as high as the shutter willl allow you.

Or in simpler terms, the leaf shutter may let you operate at 1/500th, but the transmitter/receiver wont.