Dennis Ersöz uploaded a video comparing the Sony PMW-F3K, Panasonic AF100 & Canon 5D MkII cameras for gain sensitivity in low light conditions and jello from rolling shutter.  As expected, the F3K outshines the competition while the 5D MkII seems to outperform the AF100 in some tests. The 5D has the worst jello problems and the F3K and AF100 both suffer from milder versions.