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Re: filmscanners:minolta and med format
In a message dated 12/18/2001 9:33:40 AM EST, PWilson@gomez.com writes:
> First of all, based on the way the film holders work, it's physically
> impossible to scan a piece of medium format film in the way you're
> describing. That is, unless you cut up the film in 24mm wide sections and
> use the 35mm holder.
The hardware is perfectly capable of scanning a 40 mm wide piece
of Medium Format film at 4800 dpi using the medium format film
holders. The key is that the lens moves in and out - it can scan
60 mm width at 4800 dpi or 40 mm width at 3200 dpi.
An existance proof of this capability is VueScan - set
"Device|Mode" to either "MF 4800 dpi" or "MF 3200 dpi".
> Also, on the subject of interpolation, it's debatable whether or not the
> Scan Multi Pro is doing interpolation (as people usually think of it) to
> reach 4800 dpi with medium-format film.
It certainly is interpolating the CCD data from 3200 dpi to 4800 dpi.
> Because it
> actually extracts more information from the film at 4800 dpi than it does
> 3200 dpi.
The stepper motor steps at 4800 dpi in this case. The stepper
motor is actually capable of 9600 dpi stepping, and uses a divisor
of 2 to step at 4800 dpi and 3 to step at 3200 dpi.