Vibrations for a high res scan can kill it Now your stupid question isn t so stupid because I have no idea I ve never changed the dpi setting level after I ve captured the image It s also possible with modern banknotes that less is more all the overlapping colored lines are likely part of the anti counterfeiting measures so the more detail you try to capture the less sharp it becomes complete speculation And a completely off topic question I m going a few places and one is a non FOP country Morocco I will take all the pictures I can for myself In terms of what I can use for Wikipedia in practical general terms what will not fly