RE: filmscanners: Nikon Scan & VS Negative dynamic range

["Jawed Ashraf" <Jawed@cupidity.force9.co.uk>]

It is very simple: NS decides to clip a neg scan if the dynamic range
encoded in the neg is more than a certain amount.  I don't know what this
amount is, but I can demonstrate a very strong difference between NS and
Vuescan in this respect with shots on Supra 400.

No amount of adjustment to NS's master or R, G, B light output levels solves
this problem - you can tweak the output levels to choose which you'd rather
lose (shadows or highlights) but you cannot get the full range of such a neg
with NS.

Maybe older versions are different.  I write this with respect to NS3.0 and
3.1 working with my LS40.

(Hoping I haven't grabbed the wrong end of the stick.)

Jawed

> -----Original Message-----
> From: owner-filmscanners@halftone.co.uk
> [mailto:owner-filmscanners@halftone.co.uk]On Behalf Of Austin Franklin
> Sent: 05 September 2001 23:53
> To: filmscanners@halftone.co.uk
> Subject: RE: filmscanners: Nikon Scan & VS Negative dynamic range
>
>
>
> > Comparing NS3.1 with the Kodak print of the Max400 Stouffer dupe,
> > NS3.1 has
> > more dynamic range by at least two stops.  The print compresses the
> > brightest 2 stops and the darkest step is compressed.
> >
> > Mike Duncan
>
> What does the scanning software have to do with the dynamic range of the
> scanner?  Are you letting the software set your setpoints?
>
>