> If the "shutter" were only open for a .01sec period, and then stayed
> closed until the next opening .1sec later, and if a gun flash only
> lasted .1 sec, then you should only expect to see between 10% and 20%
> of the flashes.
This seems incorrect to me. You should see all of the flashes that overlap the time when the shutter is open. If the gun flashes are randomly distributed over the .11 second period, then you'd expect to see almost 90% of them. (All but the ones that start during the first .01 seconds of the .11 second period will last long enough to still be visible at the next opening.)
--- Chris Hibbert firstname.lastname@example.org http://www.agorics.com 650 941 8224