[filmscanners] Re: 8 bit versus 16

["Arthur Entlich" <artistic-1@shaw.ca>]

OK, I was covering my butt, in case "someone" (a-hmmm) knew of some I
didn't... I don't deal in the $150,000 scanner market so maybe there are
some scanners that can accurately capture a full 16 bit depth.

Several scanner companies will throw around dMax numbers based upon the
mathematical "possibilities" rather than anything approaching reality.
What is the new Minolta 5400 claiming?

Art


Austin Franklin wrote:
> Hi Art,
>
>
>>...and that's even concluding that the scanner is really
>>capturing the full 16 bit depth, which many do not.
>
>
> I'm not sure ANY do.  Do you know of a scanner that really has a usable 16
> bits of data for each color?  I know a few (and only a very few from what
> I've seen) *claim* 16 bits, but that doesn't mean that they actually can
> deliver 16 bits.  If they could, their dMax would be 4.8, and I've not heard
> that claim.  I believe the best I've seen is 14 bits, or a dMax of 4.2...but
> even at that, I'm skeptical that they actually meet that.
>
> Even if they were capable of that, that doesn't mean the bits are always
> used, especially for negative film.  Color negative film, say, with a
> density range of 3.0, would only be able to use 10 bits our of what ever
> range is available, anyway.
>
> Regards,
>
> Austin
>
>

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