action flash

action flash Very fast acoustic electronic-flash releases as used by professional photographers and in quick-motion film apparatus for action filming are 7-68 beyond the means of most amateur photographers. Simpler acoustic re- leases are normally not fast enough: a picture of a burst balloon is not very interesting; one of a bursting balloon is! If you want to film events which happen in a split second and which make a sound at the same time, the circuit described is just right for you To make possible the filming of events which are over before the sound reaches the camera, we have designed a simple light barrier through which, for instance, a drop of water can be made to fall (see below). The level at which the electronic flash fires is then preset by either Pl (acoustical) or P2 (light barrier). The output is connected to si s v 2 1 Ra y 25k _P2 1 }[ T, ~r R5 O 0k r2 T_ ij MFPD 100 or equivalent t slit diaphragm BC 557B 96 2 2 C31 10 V2 Icz R2 RJ 100„ 555 J a~on 16 1 am the ...