Interesting! Early Yesterday morning when filming some cloud and fog noticed that when facing North or South horizon was level. East/West horizon tilted, but in opposite direction. Later when in post processing the footage I noted that was not always the case. You can see this in the attached footage. The mobile phone to is to the North and serves as a reference point.
Really annoyed at this problem, it has to be a firmware problem, not mechanical as it is influenced by heading. I don't want to have to buy high end movie making software to fix tilted horizons in footage.[/QUOT
That is a great video even with the horizon problem!!