There were about 30 of us with tripods, various cameras. "Sound triggered flash". We all focussed on the subject (in this case a balloon covered with silly string) and then the lights were turned off. 'Everyone open their shutters', which we did. The demonstrator smacked the balloon with a hammer, setting off the flash, making our exposures. There were some fascinating images. All manner of things were photographed. Pencils, balloons with powder, balloons inside balloons and multiple exposures of different balloons bursting. Cheers, Brad
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