Have you seen Ken Jacobs' nervous system performance? He uses a large propellor as an external shutter to create different flicker frequency effects. Of course the projector also has its original shutter at the same time.

At 22:40 +0000 2/08/14, FCO. JAVIER HURTADO MOMPEO wrote:
I try to ask whether with this variable obturation to change the amount of black or the amonut of light would produce a perceptible effect on the projection. Because my technical partner thinks that would be the same dinamics than to speed up or down one single shutter with the step motor.
Well we will try it and see


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