The model I set everything up for flaked, so me and Pat did some sync speed tests (pat is my non speaking very patient model)
I've included the settings, what am I taking a photo of, my mirror?
photos are portrait with the camera's top to the left.
135.0mm -- f/11.0 -- (1/250)sec -- ISO640
look at the left of the frame
faster shutter moved the line
155.0mm -- f/11.0 -- (1/320)sec -- ISO640
even faster shutter
155.0mm -- f/11.0 -- (1/400)sec -- ISO640
the lights were set on radio slaves
main camera right 3' above 6 feet from the model through an umberella
fill camera left even with and 4 feet from the model through an umbrella
hair snooted shooting from behind and above camera right.
not saying the setup is good, just what I was using.
here is one done "right"
155.0mm -- f/11.0 -- (1/125)sec -- ISO100
Pat is a great help... [grin]