I think it would be important to get a scanner where averaging can be done without moving the sensor. Vuescan can do averaging, but with my Artixscan 4000, the the image must be scanned multiple times. This is from scratch, i.e .the whole image is scanned multiple times, moving the film over the sensor on each scan. With the Polaroid version of my scanner, the scan line itself can be averaged without moving the line sensor. That is, for each line that is scanned, the CCD is read multiple times. This allows the noise to be reduced without adding blur due to imperfections in the repeatability of the scanner in term of position.
Incidentally, I've gone to Astia 100F to get around blowing the highlights. It is less contrasty, but on average, I get better shots in situations where I really can't control things like specular highlights that often go to white on Provia 100F. Even when Astia is pushed one stop, I think the contrast is still a little less than Provia 100F. Paul D. DeRocco wrote: >>From: Andrew Skretvedt >> >>In evaluating a film scanner, one should consider its dynamic range. How >>deep can a scanner reach in and pull out shadow details from a very >>contrasty slide, for example. What about one that might have been >>underexposed a bit as you tried to keep from blowing out highlights? >> >>I've seen some dynamic ranges posted for certain scanners here and >>elsewhere, many appear to be measured figures. But for the Minolta >>DiMAGE Scan Dual III and IV, the posted figure is 4.8 (calculated). >> >>That figure appears to be the theoretical dynamic range for the bit >>depth of the capture. Of course this is not going to be its true range. >>Does anyone know the actual range of these scanners? How is dynamic >>range measured? >> >> > >Dynamic range is limited by noise in the sensor. You rarely see specs on >this, even though a meaningful spec standard could certainly be devised. > >-- > >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
