Lots of discussion about scanning film to digital files and all related to digitizing film into digital files. Out of curiosity put a sheet of 5x7 Ektachrome made decades ago as part of checking out a Goerz 14" f9 APO artar before taking ownership. Put the 5x7 color transparancy into the 4990 scanner converted it into a digital file.
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Did a crop section of this area of the image.
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Further crop to the STOP sign. No attention paid to optimizing scanner focus and ...
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Same STOP sign imaged with the Wild M420 macroscope. Stop sign measures 0.026" across with the image length about 6.8" or about 260x.
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Bernice