In a message dated 11/15/07 1:19 AM, Jan-Willem Rossee wrote:
> The "dynamic range" specified by the manufacturers is usually the
> potential bitdepth from the A/D-converter, which is not the correct
> definition of dynamic range.
Hi Jan-Willem.
It's a very widespread habit in the scanner marketing literature to report
the dynamic range of the scanner as being equal to the *potential* that its
A/D converter is capable of handling. No mention is made, instead, of the
far more relevant and important *actual* density numbers of which the
scanner is optically capable.
Even "higher-end" manufacturers like Imacon/Hasselblad blithely engage in
this blatant deception routinely, without any apparent shame.
And if the excuse is that the marketing people write these things because
they don't know any better (thin excuse that would be anyway), the technical
people who read the marketing copy should point out the inaccuracy of such
claims. But then, there may go their jobs -- along with the dynamic range...
Marco Ugolini
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