Re: [APML] Speeding up film - examples

["John C. Mirtle" <jmirtle@shaw.ca>]

OK - I have uploaded some images that show the effects of the cold on long
exposures. Both shots are of Mars passing the Pleiades, back in Dec 1990.
The shots are about a month apart, taken with a 6" f4.5 Newtonian, using 120
format Ektachrome 400. The chilled shot is 1/3 the exposure time of the
ambient, and easily records way more "stuff". Back in those days, Ektachrome
had way more reciprocity failure than the current breed does, so the effect
is more dramatic. You can see the images at
http://members.shaw.ca/jmirtle/coldcam.htm , about 1/3 down the page. You
may have to hit "reload" on your browser to see the changes...

>Understood. I'd still like to know if I am going to
>see my shooting times shortened. I guess there's only
>one way to find out for sure, but it needs to get as
>cold as was a few days ago.

I don't know Alan, I would rather be shooting in a T-shirt and shorts and
using dry ice to chill the film! All dressed up and looking like the
Michelin Man while attempting to prevent various body parts from freezing to
equipment is for the younger generation. I'm getting too old for that! As
for which films work best in winter, the jury is still out....

John Mirtle
Calgary, Ab. Canada


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