Re: [APML] Pentax 67 purge port........NOT!<g>

[Philip Perkins <philip@astrocruise.com>]

>It would be nice to avoid bringing  a high pressure cylinder of N2 along.
>The air is so dry one sees a graphic example of why to wind the film slowly
>in the camera or risk a 'lighting streak' on the film.  When I was digging 
>into
>a plastic bag, I saw many flashes of electrical discharge from the static.

Tim,

That illustrates the dryness of the air more clearly than anything.  I 
don't think I've ever had a static discharge from film handling - the air 
just has too much moisture in it, even at my southern France site.  With 
that sort of air dryness I don't think you will see any real gain from 
using an N2 purge.  There is still the O2 question, but in my experience it 
is the H2O that matters most.

--Philip

Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


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