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RE: filmscanners: Canon FS4000 problems
>I did some tests last night with a Stouffer 21-step wedge and found some
>interesting results!
>
>The Canon FS4000 managed a Dmax of 1.8 in auto exposure and 2.1 if I
>cranked up the exposure to max (but then the scan looked REALLY bad).
>
>My Epson 1640 Photo did much better, 2.7 - 3.0 depending on target (35mm,
>120 & 4x5).
>
What software are you using? There is a problem with the Slide media
setting in Vuescan. Use Image instead. My Nikon IV reaches 3.0 in Image
media setting, but drops off at 1.8 with Slide media setting. You will
likely have to increase brightness to map the OD of 3 into 8-bit computer
graphics.
I have a 27-kB PNG picture of the curves for the Nikon IV scanner with
NS3.0, NS3.1, and Vuescan (Raw, Image, & Slide).
Mike Duncan
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