3)Cold and Dry. The places I set up at are always cold at night, even
in the summer. I don't think I've ever seen nighttime low temps above
40F except down in NM or AZ. It's also usually pretty dry around here
and even drier in the other places I like to go. I'm not sure how much
that could affect exposure time, but it sure is nice to not need dew
heaters every night.
4)Reciprocity failure. E200 seems to just keep recording no matter how
long I shoot. Once I found an exposure time that works, I tried cutting
it down and pushing the film a stop instead. That seems to work, too.
All I can say is that the film seems to have very low reciprocity
failure, and that's got to help make the most of any exposure time.
If anyone else has some ideas about this, I'd be interested to hear
them. And thanks for the nice comment about my image, Robert!
I think you've covered most of the possible bases. The discussion a couple years ago about film speed doubling at the freezing mark, plus your altitude and dark skies gives a huge advantage.
Alan
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