[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [APML] tech pan revisited



Nice shots Scott except the trailing. It's always something <g>
Moisture is about the only thing left. It does it in different cameras and
only hypered TP has the problem. Only hypered TP is really sensitive to
moisture. Especially high vac TP as Chuck says. Next time out try to get a
good almost air-tight seal with a large zip-lock bag around the whole setup.
Put several fresh dessicant pouches in there too. Do not run your N2 purge
if you have been doing this on these problem shots. It hasn't helped so far
assuming this is the problem. You might have a tank and/or N2 that's wet to
start with.
With care you can advance the film and start/end exposures without opening
the seal.
Take special care to keep the film dry pre- and post- exposure and until it
is processed.
If you find this is the problem then you can check into a high purity N2
from your supplier. You'll need to make sure the tank is purged and purified
too.
Bobby Middleton

baloney detection:
http://www.koyote.com/users/bobm/Baloney%20Detection.htm

----- Original Message -----
From: "Chuck Vaughn" <aa6g@aa6g.org>
> I'll be willing to bet you have a moisture problem.


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo