Austin wrote:
>The image data only spans a small part of the 16 bit
range. Increasing exposure time only incureases DMax.
And we're talking about the Leaf scanner here, right? I'd think that
increasing exposure would also burn out highlight detail. It wouldn't
eliminate DMin, just extend it across the board. If not, you've got a
helluva scanner there, Mister. :-)
Best regards--LRA
>From: "Austin Franklin" <darkroom@ix.netcom.com>
>Reply-To: filmscanners@halftone.co.uk
>To: <filmscanners@halftone.co.uk>
>Subject: RE: filmscanners: Magnification of light - AND brief density
>math lesson...
>Date: Mon, 18 Jun 2001 22:43:52 -0400
>
> > [rafe b:]
> > >> And BTW, when Austin talks about 5080 dpi from 35 mm film,
> > >> he probably should have mentioned that it takes about an hour
> > >> or so to produce that scan, in RGB. I hope you're not in
> > >> a hurry. <g>
> >
> > [Austin:]
> > >That's not entirely true. It depends on the exposure time, and
> > how new the
> > >bulb is. If you set exposure to min, it will scan in around %20
> > the time.
> > >
> > >B&W is single pass, and can use min exposure, so it is really
> > comparable to
> > >the newer scanners in terms of scan time.
> >
> >
> > I'm afraid I don't understand. Doesn't the proper exposure
> > depend on the image under consideration?
>
>No. More so the film. The image data only spans a small part of the 16
>bit
>range. Increasing exposure time only incureases DMax.
>
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