The point of focus for a flatbed scanner is the scanning bed itself. As objects move away from this plane, they don't scan nearly as well. I think I paid $400

The point of focus for a flatbed scanner is the scanning bed itself. As objects move away from this plane, they don't scan nearly as well. I think I paid $400 for my first 600dpi scanner, which was awesome for a flatbed back in the day. I scanned all sorts of things with it. Especially PCBs. If the object I was scanning wasn't perfectly flat on the glass, the results were terrible.