The software for my scanner (Epson perfection2400photo) lets you chose the resolution. I've assumed others do as well.
I usually choose the higher resolution if it's not really expensive. I never thought I'd use 1200, let alone higher, but I'm using it more as my eyes get worse. And I've used some scans at 2400 to look at a few things. Much beyond that is pretty much overkill for printed items. For examining details of photos as much resolution as you can get is better as long as the photo is in focus.
Most of the pictures in my pictures folder were done at around 200 dpi, the ones showing close details were usually at 800 or 1200 then resized.
Steve B
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