On Dec 3, 2005, at 8:50 AM, Tim Øsleby wrote:
Could this be part of the reason why many experience better results
scanning
dia than negative film?
Mounted dias is 1-2mm above the glass, depending on what kind of
dia frames
used.
It's certainly part of the reason for this scanner (Epson Perfection
2450). Other scanners might be different, you have to evaluate what
you have to work with carefully to optimize results from it.
For those interested to see what the difference between scanning with
the Epson Perfection 2450 and the Minolta Scan Dual II might be, I've
created a web page with a sample image:
http://homepage.mac.com/godders/scannercmp/
The 600 pixel wide, post-processed images on the page are linked to
their respective scan originals (click on the pix to see the original
scans in separate windows). The scan originals are exactly as they
came out of the scanner, transformed only into high-quality JPEGs to
reduce size. Post-processing included downsampling to 600 pixels
wide, performing sharpening operations and a very minor tweak with
Curves to make the two different scans look as close as possible.
Godfrey
