At 05:23 2/18/01, John Hudson wondered:
Hi everyone..
Can anyone tell me the extent of the reciprocity failure of K25 at
exposures greater than one second and whether there is / are any rule[s]
of thumb to determine the additional exposure time over and above that
shown by my light meter?
John Hudson
Vancouver, BC
John,
The data sheets for Kodak film are available on-line. Reciprocity failure
points and compensation required is part of the data sheet. See the one
for Kodachrome 25 here:
http://www.kodak.com/global/en/consumer/products/techInfo/e88/index.shtml
A PDF which includes the film structure and response curves is here:
http://www.kodak.com/global/en/consumer/products/pdf/e88.pdf
-- John
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