Originally Posted by
Mark Sampson
"How big can film be optically enlarged?" Using a Kodak Beacon Precision Enlarger, you could get 153x magnification. That was from small sections of aerial reconnaissance negatives. I used and trained people on that monster for 20+ years. Of course that machine was not useful for any type of conventional photography, so the answer isn't really an answer at all.
Ultimately, the enlargement capability of a ordinary camera negative is determined by the photographer's decision about what's "good enough" and what hardware (and paper) they have to make the biggest print. And of course final viewing distance plays a huge part.
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