theSuede
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 p.1 #18 · Skin Tones: 7D vs. 5D Mark II | |
Please consider that your calibrated profile will only be "accurate" at WB temperatures very similar to the one that you made the test with - all others (warmer/colder/fluorescents) will show some hue shifts in between the primaries.
The primaries in the camera are red, green and blue - just as in your screen - but placed a little different in wavelength, and more often than not less symmetrical.
Depending on WB temperature, the intermediate colours will be pushed towards one side when WB changes (yellow/orange will become more red and blue-green will become more green when you shoot in lower WB temperatures (warmer colour), and the opposite "reaction" for higher WB temperatures (colder colour)
LR/ACR/DNG can compensate for this by having two complete sets of correction values, but these "variant" profiles HAS to be made with the specified 2850K and 6500K illuminants if you want the correct result (unless you know how to modify illuminant tags in DNG profiles).
The Passport or CC24 by X-rite are good products, but actually a little to coarsely populated to make an accurate profile - you need more patches than 18 to allow the profiling to work with any accuracy... (Six of the patches aren't "colour", they're patches of "almost perfectly gray"). But you WILL get better results than the "canned" profiles in most cases anyway.
For most photographers, two or three sets of profiles covers most bases, and only in more accurately controlled environments is it worth the hassle to do a "scene-specific" profile. One of the occasions when a "scene-specific" profile IS worth the hassle is under fluorescents, indoors. Shooting in offices/presentation aulas/kitchens or other fluorescent lit areas you notice a very large difference with/without profiling. Ice-hockey rinks and other indoor sports are also a good target use for specific profiles.
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