Agreed, looking for a way to isolate or reduce vibration transfer from the adaptor to the camera.

It is there, but more hidden by the nature of the footage on the other clip, as soon as you get some clearly defined verticals, it becomes pretty obvious - so you can get away with it if you choose the right subjects (people/nature) and/or keep the camera moving.

Just bought a SGPro, which does not suffer from this :)

Thanks for the comment. How does the SGPro get around it? I've understood that the CMOS is the problem, here, not the adapter. ??

The problem is the vibrating motor shaking the camera (and CMOS/Rolling shutter system).

Without the vibrating adaptor you would need to really throw a CMOS camera around to get the rolling shutter problem, it wouldn't show itself when - for instance - panning the camera around your local park, taking in the view.

The SGPro is a 'spinner' - that is: the ground glass spins, instead of vibrates, so the camera is not shaken.

Here is some SGPro footage.

vimeo.com/1457615

This problem is persistent regardless of shutter speed.