danbrady

Me too - I'm interested

I've been told that the ROC system has no problem with shutter speeds up to 1/180th of a sec; faster than that and you may still be firing the strobe(s) when the shutter starts closing. I shoot mine in Manual all of the time, with the fastest speeds used to try to cut down on ambient light in the negative space. (After training for years on Velvia 50, an ISO of 200 in the D100 seems to combine with the better light sensitivity of the CCD to make the light fall-off in empty space much harder to accomplish). Slower speeds down to 1/50th will still freeze a lot of subjects, while pulling in an almost "wide-angle" degree of blue water background.