"The picture shows one of the several water roads that drive the complex production of paper and flours. I used a focal of 100mm, hole of 0,5mm and some 6 seconds of exposure. Film was Fujicolor 100 developed at home."
"The device used was an Agfa Synchro Box whose single lens was replaced with a black piece of film where a hole was made with a needle of 0,5mm."