Re: Questions RE: Old, poorly stored film & B+W filter's IR Cmnt

[Cor Breukel <cor@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

On Tue, 30 Jul 1996, Adam-HALPID Klyce wrote:

>      Ladies & Gentelmen,
>      
>      Hi'ya. I am planning a trip to Yosemite next weekend and as I
>      started to pack some stuff last night I realized I have had a
>      roll of Kodak's HIE in a photo-backpack for some time. It's 
>      been in a closet but the temperature must fluctuate pretty
>      much between 65 deg.(F.) & 70 deg.(F.) I am wondering if 


..don't know about storage, but I carried Kodak HIE around in India,
Guatamala, Mexico and Egypt with no problems at all. This trips were
between 2 weeks and 1 month, and no refrigration ofcourse ;-).. 


>      
>      "In general, the sensitivity of black and white infrared film is
>      about ISO 50/18-degrees. Kodak infrared film and the B+W filter

..sounds like gross overexposure to me: I shoot at 250 ASA, using through
the lens metering through a dark red (+3 stops) filter, and you can start
with even higher speeds.....

 >      #092 is about ISO 20/14-degree; with the
B+W filter #093 about



>      the strength of the infrared radiation in the scene which is 
>      much higher when the sun is low than at any other sun angles...

.The much quoted book of Gunter Spizing states this also, and I also
noticed it, the Wood effect is most dramatic at dusk & dawn (these hours
are the best very almost all photography)..

Cor Breukel 
http://ruly70.MedFac.LeidenUniv.nl/~cor/cor.html
cor@xxxxxxxxxxxxxxxxxxxxxxxxxxx


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Topic No. 7