image quality

For some reason a clear, even blue sky has a strong gradient from light to very dark blue. This occurs without a filter and also with an 8 filter (so far) on the Zenmuse X3 camera. You can see what I'm talking about in this footage: FYI the sun was not off to the left where the sky looks...

Hello: I am a pro photographer exploring aerial photography. In the previous months I broke two Hubsan X4 getting used to the controls. Now I am flying confidently a P3P and it is time for the real imaging experience. There is a lot of information and samples to compare I1 vs. I2 for video...