I just recently purchased a Sekonic C-500 color meter in order to know how much CTO, CTB or +/- Green to add to lights to match different environments. I'm wondering how to directly interpret the readings of the meter into the most common denotation of gel strengths - i.e. 1/8,1/4, 1/2 and Full (Color). I can figure out Kelvin with some quick math but where do you find what strength of +/- green to use? The meter reads 0-50 Magenta and 0-50 Green.
Also the readings in digital mode are very different than in film mode. For example a reading in digital mode of CC filter 5M will be CC filter 25M in film mode. Anyone using this meter that could lend me some incite?