Quote Originally Posted by aldobranti View Post
I have some mental blank about curves and thus have problems every time I walk up to PhotoShop.
Try DPUG for your digital questions.

If you are interested in sensitometry of film try these excellent resources:
http://www.amazon.com/Photographic-S...rds=todd+zakia

http://motion.kodak.com/motion/uploa...y_workbook.pdf