Re: [APML] Self hypering camera from Taurus-tech?

["Steve..." <swalters@worldnet.att.net>]

I believe a few people have claimed that dessicating E200 improves its
sensitivity and color balance. I plan to experiment with this at some point.

Steve...

----- Original Message -----
From: "Bert Katzung" <katzung1@attbi.com>
To: <astro-photo@seds.org>
Sent: Monday, September 30, 2002 5:28 PM
Subject: Re: [APML] Self hypering camera from Taurus-tech?


> According to Wallis & Provin in A Manual of Advanced Celestial
Photography,
> straight dessication and nitrogen soaking does have a definite effect in
> improving film sensitivity/reducing reciprocity failure. The magnitude of
> effect in their Table 10.2 is only graded into slight, effect(ive), and
very
> effective, plus avoid, but  they rate nitrogen soak or bake as Effective;
> forming gas soak or bake is Very effective.
>
> In another place they say that dessication and oxygen removal are
essential
> in the hydrogen-sensitizing process and imply that this holds for any type
> of sensitization.
>
> I wouldn't write off the Taurus device until several people have tried it
> and reported on it. If 120 size astro-capable print film were still
> available, I'd be more interested in a 120 version of it, but given the
> dismal lack of 120 astro print films, it doesn't look as though that will
be
> relevant.
> Bert
>
> Bert Katzung
> katzung1@attbi.com
> www.astronomy-images.com
>
> ----- Original Message -----
> From: "Alan Voetsch" <critter12952@yahoo.com>
> To: <astro-photo@seds.org>
> Sent: Monday, September 30, 2002 4:19 PM
> Subject: Re: [APML] Self hypering camera from Taurus-tech?
>
>
> > --- steve banbury <banburys@sonic.net> wrote:
> > > Only one--they out to rename it 'nitrogen purge and
> > > desicating camera'
> > > rather than "self-hypering which means something
> > > else to most of us!
> >
> > Hi Steve,
> >
> > Would those properties have any positive effect on
> > plain un-hypered film? I believe these are desirable
> > attributes when shooting hypered film. But for someone
> > shooting out of the box film, is there anything to be
> > gained?
> >
> > Alan
> >
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