As resident cheeky whippersnapper, I do happen to know ASA=American
Standards Association and ISO=International Standards Association without
looking them up.
Now, there was a post about the loony f/4 rule, where exposure for subject
lit by full moon is 1/ASA in days at f:4. So, for 400 speed film, exposure
would be 1/400 of a day, or 86400secs/400, 216 seconds. If there is half a
moon, would the exposure time be 432secs or is the relationship nonlinear?
/Acer "cheeky whippersnapper" Victoria
--
"Like a cat / Dragged in from the rain / Who goes straight back out / To
do it all over again / I'll be back for more / ...." --Depeche Mode
http://student.ucr.edu/~siddim01/ <--don't visit just yet!
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