Actually silver halide crystals can either turn into metallic silver
or they don't.
They can only be black or white.
In that sense, they are digital!
At 18:10 -0800 11/11/14, Dave Tetzlaff wrote:
A photochemical film frame is an analog reproduction. The density of
silver halide particles is an analog of the light intensity striking
that part of the frame. Analog reproduction existed before 'signal':
phonograph recordings.
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