On Mon, Jun 06, 2005 at 06:48:34PM +0200, DagT wrote: > > A good and prepared photographer can react in 1/10 second.
If you're prepared, and the action is predictable, you can do a great deal better than that. As most here know, I spend quite some time photographing cars travelling at a high rate of speed. The most extreme case of this is at the super speedways, where cars get up to speeds of 240mph - that's 352 feet/second. If I could only rely on 1/10 second accuracy, I'd never be able to get a shot with a car crossing the field of view of a fixed camera - in 1/10 of a second the car travels twice its own length. But I have managed to get shots like that; in fact I can (with a little practice) get the car within five feet of perfect positioning. That's a ten-foot window, which means I'm achiving closer to 1/30 of a second precision.
