There is a physical limit to what a scanner can do. In standard photography, your resolution is limited by the grain size of your film emulsion. But in scanning, resolution is limited by the dpi (dots per inch) capability of the scanner, which is a much coarser matrix than a film emulsion. A 1-mm object is only 1/25 of an inch long, so an image of such an object scanned at 1200 dpi is made up of less than 50 dots linearly, and you can't get any usable resolution working with so few dots. Paul M.