I read a little about bit depth, & from what I gather, the human eye can only see so many colors, & going with bigger color depths is good where one has to do alot of editing. most of these items are for records & archives, & maybe to be able to print from the scans, so I can throw out some of my paper.Also, when I scan in Adobe RGB, would it be best to use 48 bit depth to go with the fuller color