Kevin Waterson mused: > > This one time, at band camp, Bob Sullivan <[EMAIL PROTECTED]> wrote: > > > Take a picture of an object moving 60 miles per hour. Calculate flash > > duration based on the motion blurr you see...if you find any. > > Regards, Bob S. > > I need a flash duration of between 1/15,000 and 1/20,000 . . . .
That's definitely in the ballpark for electronic flash durations. (during which time, incidentally, that 60mph object will have moved around 1/15 or 1/20 of an inch - good luck in measuring that! :-) If you really want to measure it, I wouldn't bother with trying to measure the light. I'd find some way to get a probe onto those nice little flash contacts on the hot shoe, and watch the camera tell the flash when to fire and when to turn off.
