M. J. Powell wrote:
I've noticed that on the camera gun film shown on some TV programmes
sometimes the whole picture vibrates and at other times it is quite steady.

Mike

Depends largely on the installation of the gun camera, and its
position relative to the guns. In the P-38, the camera was
initially installed in the nose, pretty much just below the 20mm
cannon. The result was very poor to unusable footage. The camera
was later moved to one of the underwing pylons, and the result was
very steady gun footage, if from a somewhat unusual perspective.

Mike