Response to Chromogenic v. Digital

I went to a seminar about 6 months ago that was directly aimed at the professional market (ie. I was invited by a friend and went along as a "hanger on". Anyway, your query was was one of the main features in one of the presentations. I can't find my notes at present, but I recall that they claimed a 35mm neg has about 18 to 25 million "grains"; a 6x6 neg, somewhere in the area of 128 to 170 million! As a rough rule of thumb, 1 pixel=1 grain. If I find my notes, I'll post more precise figures. In any event, it seems that megapixel cameras still have a bit of catching up to do. Whether the human eye can distinguish.... well, that's another question for another time...

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