There is an artifice that will occur in periodic sampling such as digitizing when the original signal has frequency higher than the sampling frequency. The higher frequencies are folded back to the low end. The effect in a photograph with any amount of grain can make the grain look coarser than it would when viewing the photo directly. I was a bit sloppy in the post with the three images in that I did not get the same number of pixels per centimeter in both detail crops. I resampled the detail croppings at 2400 PPI for the most recent post. These are the same two negatives.