| Concrete question
Okay, so, here's a concrete question.
The K10D lets you set white balance in color temperature in Kelvin and then further tweak in Green<->Magenta / Blue<->Amber colorspace. (Which is a very cool advanced feature, by the way, and yet another reason this is a great camera for JPEG shooting.)The presets (tungsten, cloudy, etc.) also let you make these adjustments -- but in each case starting from the center. There's a linear chart (but imprecisely-labeled) of color temps vs. light source, but I'm pretty sure at least some of the fluorescent presets also include built-in correction on the green-magenta scale.
It'd be nice to easily have the information so that one could reproduce one of the predefined options in one of the three user-set slots and then tweak it slightly -- doable via trial and error or with external knowledge, but it's the kind of thing that ought to just be in the manual. (For that matter, when you do a custom wb with a white card, wouldn't it be nice if it told you what you'd measured? Maybe there's a way to do that that I've missed.)
Also, the GM/BA grid doesn't have a meaningful key, so it's hard to know what each step actually does. (Do they correspond roughly to the Kodak Wratten filter scale? Probably something like that.)
So, the question: does the Magic Lantern Guide cover this in depth? Does it give base numbers for each of the presets?
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