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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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