After lots of tests, drop the ProTune mode which is only a marketing argument and gives a blurred image, it is precisely the automatic mode ensures excellent white balance and exposure. Really big opportunities and full modes, the 30i 2.7K / s to stabilize the image in post production and 1920x1080p 60i / s for the rest. Perfect cancellation of the barrel distortion with GoProStudio2 (free) plus all installation possibilities.