High Speed Photography By Alan Sailer

'The flash is triggered when the pellet from a rifle travelling at about 200 metres per seconds passes through a laser beam. Its the same principle as those beams that set f a chime when you walk into a store,' he continues.
'The camera is set at one second and an f-stop 9-13 depending on the reflectivity the subject. The flash stops the action. The one second gives me time to click the camera shutter with one hand while I pull the trigger on the rifle with the other.'
'I have a delay circuit that I can use to time the flash, so that it goes f when the pellet hits the target. The explosion is the shock the pellet hitting the target.'