In this photography stackexchange answer it is stated that the limits of performance of gyroscopic stabilization of an Olympus handheld camera is related to the rotation of the earth. I'm further confused by the use of stops to rate the quality of gyroscopic stabilization - 6.5 stops seems to be considered the limit due to the Earth's rotation.
This can be read about further in photography trade sites here:
The in-body stabilization itself gives 5.5 stops, and the Sync IS gives 6.5 stops with OIS lenses. 6.5 stops is actually a theoretical limitation at the moment due to rotation of the earth interfering with gyro sensors.
There must be some physics at the bottom of this. How can a camera's rotational stabilization actually be limited by the rotation of the Earth, and how can that limit be expressed as 6.5 stops?