Take a look at the light pole on the left hand side of the frame. There is a bright blue line which runs down the side of the pole facing the light. Isn't that chromatic aberration? Or is it something else?
On Mon, Nov 1, 2010 at 3:09 PM, Doug Franklin <[email protected]> wrote: > On 2010-11-01 12:38, Nick David Wright wrote: > >> But some of the Plustek scans I've found exhibit the same kind of >> digital artifacting that had me so upset at that pro lab a few months >> back. So I guess those are out. > > Some of the "artifacting" has more to do with the scan resolution than the > scanner, since it's caused by a physical process somewhat analogous to the > one that creates moire patterns. > >> [...] some nasty chromatic aberration, but I >> believe that's a fleshware problem rather than anything to do with the >> scanner itself. > > Since that's a black-and-white image, I'm not sure what you're calling > chromatic aberration. But that "speckly, grainy" look just comes from > scanning at around 4000 dpi. There were some long discussions about this on > PDML a few years ago that may be in the archives, but it starts when the > scope of a scanned pixel is approximately the same physical size as the > grains in the film. > > -- > Thanks, > DougF (KG4LMZ) > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- ~Nick David Wright http://www.nickdavidwright.net/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
