On Sep 20, 2013, at 9:18 AM, Justin Krug <jkrug@hotmail.com> wrote:
The response I received was surprising. X-rite said "To make a long story short, your standards for performance and data analysis would not be well suited to use ColorChecker Passport and its DNG profiles." And also "ColorChecker Passport software was designed to be a simple camera profiling solution for casual and non-professional photographers..." The recommendation was that I use an ICC profile as opposed to a DNG profile. They also offered me a refund on the Passport.
What do you think of my test and X-rite's response?
X-Rite's answer is perfectly spot on the money. The ColorChecker Passport is a superlative tool, the best in its class. I never go into the field without mine, though I rarely touch it in the studio. It is not, however, designed to to what you're wanting to do with it. To do what you're wanting, you'll either need a chart with several times as many patches and many, many more different spectral compositions, or a monochromatic light source and associated measurement equipment. Ideally, both. In addition, you're going to have no end of troubles shooting in very mixed and non-standard lighting. Imagine shooting a theatrical event with lots of differently-colored gels over all the lights. Would you expect accurate color reproduction in such circumstances? The lighting you're describing is the same, but with the coloring of the lights being much less dramatic. You'll either have to fix the light or learn to embrace it. Cheers, b&