Just noted something odd. I always shoot with the daylight setting for white balance (I shoot raw so it does not matter much I guess). I "develop" in Capture One. Whereas for the 24-70, 85 and 135 Zeiss lenses the normal reading for daylight seems to be 5350 Kelvin (and -2 tint), the 16-35 Zeiss gives a reading of 5050 (and -1 tint). Is there any explanation for this?