MURAY VIEWER


FINE FOCUS

This small knob, when rotated a small amount to the left or right, slightly changes the focus of the image on the screen. This is normally used to compensate for the difference between negative film and positive print film. the image is in a coating on one side of the film. The side of the image is different for negative and positive so changing the distance to the screen. This is compensated for by adjusting the fine focus.



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