I will try taking some reject slides or dupes and create a warp of similar magnitude and see how the scanners respond. I may have to turn off autofocus. This will take me several days to get to, I'm afraid.
Art Paul D. DeRocco wrote: >>From: Arthur Entlich >> >>Well, that's hard to say without knowing the extent of the ripples and >>which model scanner you are considering. >> >>How much distance are we speaking about between the upper most and >>deepest ripple? Are we speaking of potato chip ripples or what? ;-) >> >>I have a Minolta Dimage Dual II and a Polaroid SS 4000+, and if you give >>me some dimensions, I can try to replicate it and see what they can do >>with it. Also, have you tried to remount the slides to see if they can >>be made to lie more flat? > > > It's hard to measure, but just eyeballing it, I'd say that I have easily a > millimeter of warpage on some of them. And it's not necessarily a smooth > domed curve from one edge to the other--some slides have ripples down one > edge. (Although a simple curve of sufficient magnitude would be an adequate > DOF test.) > > I've remounted slides in anti-Newton glass mounts, and got somewhat better > focus, but noticeable grain from the glass. However, there are two problems > with remounting. First, it's extremely time-consuming. Second, some of the > slides have ripples in them that even glass sandwiches won't take out. I > really think that increased DOF is the only way I'll ever get decent files > out of these. > > -- > > Ciao, Paul D. DeRocco > Paul mailto:[EMAIL PROTECTED] > ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
