Thanks all for the suggestions and interesting info!
"The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true.
" - William M. Ivins Jr.
"I don't know, maybe we should disinvent color, and we could just shoot Black & White.
" - David Burnett in 1978
"Analog is chemistry + physics, digital is physics + math, which ones did you like most?
Except rain water often includes air pollutants washed out of the air, so it needs some treatment as well, to remove said pollutants, it can also need some PH balancing as some rain is mildly acidic.
Originally Posted by RalphLambrecht
See my Blog at http://clickandspin.blogspot.com
The greatest advance in photography in the last 100 years is not digital, it's odourless stop bath....