GR3 auto white balance is surprisingly accurate, the tint slider hardly needs adjustment, temperature sometimes needs to tune warmer 100-200k. Very very impressive performance. The exposure metering is, umm a bit flawed in my opinion. Under exposed by 0.7ev to 1ev in center weighted mode, under 1.7ev in highlight protection mode. I shot dng + jpg at exposure compensation +0.7ev for that reason. If high contrast scene, I can recover the highlights from dng.