Originally posted by civiletti How would post-production software differentiate between warmness caused by ambient light and warmness caused by the lens?
It wouldn't know the difference. I was just saying that the white balance was equalized not in the camera (since it was captured in RAW), but in post-production software. The color difference we see can be explained then by difference in lenses used, and/or change in the lighting (since it was taken outdoors; the sun could have been lower in the horizon, causing the warmer FA31 image).
Given all that, I am inclined to attribute a difference in warmth on the lens because it is also the case that in the second set of images, the FA looks warmer.