Tom "William Tell" Reese wrote: >I've been thinking about trying some low tech "bullet through apple" >photography. I'm still puzzling through a trigger mechanism to trip the >shutter and get the flash to fire. Has anyone tried those light beam >triggers? How wide is the trip beam? Would a bullet break the beam enough to >trip the shutter? Does anyone have any ideas for a lower cost trigger?
The way these have been done in the past is with an acoustic trigger. The sound of the gun is picked up by a microphone which is used to trigger the strobe. The distance between the gun and the microphone determines the delay between the firing of the bullet and the triggering of the strobe. (Sound travels at ~300 meters per second.) -- Mark Roberts Photography and writing www.robertstech.com

