Re: [APML] RE: How do you N2 purge an OM-1?

["Glenn Ray" <glennlray@mail.ev1.net>]

Well, dang me.  I just re-examined my Pentax LX camera body and 
noticed that the base plate has two threaded caps (like the 
battery cover) used for attaching a winder.  The left cap is 
directly below the film canister and would be a perfect spot for 
introducing N2 (or dry air) into the body.  

I think this will be an optimum solution to my problem since I 
won't have to modify the LX in any matter.  I'll try to find a 
spare cap that can be modified with a brass fitting for the gas 
line --or-- have a fitting made to order.  

Didn't someone suggest this kind of solution earlier in the thread 
(i.e., introducing gas through a hole in the baseplate)?  If so, 
I'm sorry I didn't pay more attention!

Glenn Ray


---------- Original Message ----------------------------------
From: Joe Pedit <pedit@email.unc.edu>
Reply-To: astro-photo@seds.org
Date: Fri, 30 Aug 2002 19:56:10 -0400

>Glenn,
>
>I destroyed a Pentax 67 when drilling a gas purge hole so I 
understand 
>your hesitation of drilling a hole into your Pentax LX.  
Piermario 
>Gualdoni suggested encapsulating the camera with a plastic bag 
>containing silica gel 
><http://astro.umsystem.edu/apml/ARCHIVES/SEP99/msg01008.html>.  
That 
>method diminished the film curl problem to some extent.  I have 
had 
>better success purging N2 into the plastic bag.  I give the 
system a 
>blast of N2 at the start of the exposure and then reduce the flow 
to a 
>trickle.
>
>Joe
>
>
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