Direct quote from Dan Carr's web-site... are you going to tell him to get a clue???
yep i do exactly that.
of course 1/500s or 1/2000s would be nicer then 1/250s.
but 1/250 or 1/300s thatÂ´s just a matter of more flash output, smaller aperture, a ND filter etc. and not a dealbreaker.
This goes back to strobe and exposure 101... first of all, the strobe, in most situations, should be fast enough to freeze action and so that brings up the situation of darkening the ambient to match your situations... ND filters, polarizing filters, lowest ISO possible, etc... assuming you're trying to underexpose sunny 16, ISO 100 at 1/250 at f16 is 1 stop under... add a ND filter or polarizing filter and that's a few more stops... there you go... how much more underexposed do you want? Lastly, minimum shutter speeds has always been an issue with shutter curtains (not so much with leafs)... It isn't like in the good ol film days where some where at 1/30... remember those dinos?