Re: Purpose of missing anti-halation layer?

[pauck@xxxxxx (Marco Pauck)]

> > OK, finally I'll take the opportunity to post a question I've always
> > asked myself: "*WHY* does HIE have no anti-halation layer?"
> > 
> > The resulting halos around highlights are beautiful for fine-art
> > photography.  But given that HIE (and HSI) were mainly developed (and
> > used) for scientific applications, I would assume that this effect is
> > quite disturbing there.

> more film in same size magazine. a big deal in high speed shoots.
> 
> some systems are not bothered by the halo effect. depends on how its engineered.

I don't think it has to do with the thin ESTAR-AH base because there
are other films using it too, having an anti-halation layer (e.g.
Technical Pan 2415).

To add to my original question: For Technical Pan Kodak states that
"The 0.1 neutral density built into the ESTAR-AH Base is one-half to
one-third that found in conventional 35 mm picture-taking films."

So, is the anti-halation layer just neutral densitiy added to the base
(this would explain how it reduces the 'light-pipe effect') or is it an
additional layer?

	Marco
-- 
Marco Pauck - WMD GmbH Hamburg, Germany - http://www.pauck.de/marco/
e-mail: marco@xxxxxxxx, phone: +49-40-58958-120, fax: +49-40-58958-199
For every complex problem, there is a solution that is simple, neat,
and wrong.  -- H. L. Mencken
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