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Sistema de arrastre
 
En esta fotografía del interior de la cámara puede verse el plano
focal que rodea los 2 núcleos de película, el de arriba es el que la
recoge ya expuesta al girar el mando de arrastre. La línea azul
describe el recorrido que sigue la película durante su transporte.

Si pasas el cursor sobre la imagen puedes ver la cámara cerrada.
Los seis puntos cerca del diámetro exterior marcan la situación
de los estenopos cuando el obturador está cerrado. Dos de ellos,
los de la derecha en esta vista, tienen 2 puntos para indicar
cuales son el primero y el último estenopo en la imagen final.
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