#59. "RE: Testing of D800 with Reikan's FoCal application" In response to In response to 58
Come to think of it... I think correcting white balance (i.e changing FoCal's color temperature parameter) is probably also not a good idea. White balance correction shifts colors. We want to focus on actual green, rather than "corrected" green. Thus it would seem to be optimal to leave FoCal's color temperature setting at the default - irrespective of how the target is illuminated.