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[filmscanners] Re: grain

Can't help directly, but perhaps this might be worth checking..

I've noticed that on some transparency films, I get a grain-like effect in 
shadows when I use a black point other than zero (in Vuescan).  I haven't yet 
looked into exactly what is happening, but the 'noise' vanishes as soon as I 
set bp to 0.

So it is obviously not CCD noise, and the last time I noticed it was on Provia 
100F.  This is on a 2700 dpi scanner, so I doubt it could be grain or aliasing..

mark t

Steve said:
> My negs are developed commercially - they use Ilfotech so they're not
> especially grainy at all . I dont understand the term "grain aliasing"? The
> scans , unless I'm missing something [in Nikon scan] , are done without any
> fiddling.......
> If it turns out that theirs not much to be done , which B&W films do give
> good results with this scanner??
> Thanks ,
> Steve
> > I have a Nikon 4000 scanner and seem to be getting what looks like grain
> > from scans of Ilford Delta 100 . This is a fairly fine grained film so
> > I'm
> > assuming this is something I'm doing wrong with the scanning
> Well, it may be, but grain aliasing is still a possibility, specially if

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