[filmscanners] RE: Avoiding Newton rings

["Tim Atherton" <tim@KairosPhoto.com>]

using plastic/mylar type anti-newton sheets on 4x5 and 8x10 transparency
scans on my flatbed it doesn't seem to add texture or suchlike (and the
sheet is between the scanning head and the image). There maybe some very
slight softening, but I've done side by side comparisons and couldn't really
tell - but I'm sure the big neg helps.

tim

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Paul D. DeRocco
> Sent: Sunday, September 29, 2002 9:50 PM
> To: tim@KairosPhoto.com
> Subject: [filmscanners] RE: Avoiding Newton rings
>
>
> If the only texture is behind the image, it would add grain, but
> at least it
> wouldn't blur the image. I find that an anti-Newton slide mount, which has
> textured glass on both sides, does blur the image a bit.
>
> --
>
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@ix.netcom.com
>
> > From: Arthur Entlich
> >
> > I'm not sure I accept this statement.  If the texture is visible in
> > scans, it would show up on either side, unless the depth of focus/field
> > had a very fast drop off to limit the ability to have the texture in
> > focus. With the surface of the anti-newton glass being literally
> > contacting the film surface, I would expect any texture would be
> > recordable regardless of which side it appeared on, relative to the
> > scanning mechanism, being that the scan is a transmissive type, not
> > reflective.
>
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