Here's a fun thread cross-reference:

http://www.apug.org/forums/forum48/1...itivities.html

So you have human eyes which see a peak at green, film which sees a peak at blue, meters which see a peak at red*... Good luck lining any of them up.

*the Weston Photronic cell (I picked a fairly red-sensitive meter cell deliberately to present the worst case scenario).