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Re: Process quickly or...

  • From: P3D William Carter <wc@xxxxxxxxxxxxxxxxxxx>
  • Subject: Re: Process quickly or...
  • Date: Wed, 2 Oct 1996 16:31:39 -0700
Michael Kersenbrock Asks:

>Does the film's ASA rating (etc) vary significantly with temperature at 
>time of exposure?

To minimize reciprocity failure, I've shot with my film backed by a copper 
box filled with dry ice. Everything went predictably, ASA rating (etc). 

Astro-photographers regularly use "cold cameras". In these the film is 
cooled by liquid nitrogen. I know we have an astrographer or two out there 
who could bring me up to speed, but I've never heard of exposure or color 
shifts in one of these.

 I expect the cold just stabilizes the halides.

-- 
                wc@xxxxxxxxxxxx
    37deg 39.09'N x 122deg 29.56'W x 90'MLLW





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