From: Ed Buffaloe (EdBuffaloe@unblinkingeye.com)
Date: 06/04/02-05:17:19 PM Z
Shannon,
As soon as I saw your post I realized that I made an error when I
made my pinhole calculator. I read the information from
http://www.peakpeak.com/~mhoover/alpenglowphoto/techinfo/tiflmexp.htm
incorrectly. It simply states that this exposure time gives an increase of
N+ whatever, and I kept obstinately thinking that must mean you have to give
the film a + development, but I now realize it means just the opposite. I
have corrected my exposure calculator and beg forgiveness for promulgating
incorrect information.
Ed Buffaloe
http://unblinkingeye.com
----- Original Message -----
I have a chart that shows reciprocity failure adjustments for various
black and white films. This chart also suggests decreasing development
times as exposure times increase. The reasoning is that reciprocity failure
affects the shadow areas more than the highlight areas. Is this correct? I
also have a pinhole time calculator that suggests INCREASING development
times as exposure times increase. Which is correct? (Excuse the
cross-posting if you read alt-photo-process and pinhole-discussion.)
--shannon
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