RE: [APML] Tech Pan and Moisture

["Scott Hammonds" <capella@creatorsview.com>]

Chuck, Kent,
Thanks for the replies. The Tech Pan is hypered and with a high vacuum.
It has been kept in a zip lock bag with desiccant from the beginning in
the freezer. I've never had a problem here at my house, it's fairly dry,
but I'm heading to a dark site that is really damp. I'll keep your
suggestions in mind and let you know what happens.

Scott Hammonds

 

-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org]
On Behalf Of Chuck Vaughn
Sent: Sunday, June 01, 2003 5:54 PM
To: Discussion of Film Astrophotography
Subject: Re: [APML] Tech Pan and Moisture

Scott,

It's going to be hard with that kind of dew especially if you used a 
high vacuum before hypering. Also, cameras are not really airtight and 
if there's a breeze, that will overpower the dry air. A plastic bag 
covering the camera will take care of that. After removing the camera 
from the scope, continue the dry air purge with the camera inside a car 
or house.

Chuck <aa6g@aa6g.org>

------------------------------------

> Hey list,
> I finally have some time to shoot Tech Pan again (or anything for that
> matter) and try to find out what was causing the problems. I'm using a
> dry air purge system. My question is this: if the moisture content is
> very high, as in dew dripping off of everything, can I still shoot
Tech
> Pan with a reasonable expectation of success? When I finish the
> exposures I plan to leave the film in the camera until I put it into 
> the
> developing tank, hopefully with in a few hours.
>
> Thanks,
>
> Scott Hammonds

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