AXIS MATCH
The angle from which the camera shoots the action remains the same from shot to shot. For example, if the first shot is a long shot and the second a medium shot, the camera moves forward along the "z-axis" without changing the angle from which the action is photographed. If the angle changes slightly, it will appear that elements in the background of the shot have shifted slightly, and the continuity will not be perceived as smooth. If there is a marked change in camera angle (in which the camera moves through 90 degrees) the shot will be perceived as smooth because the background will be markedly different and not create a confusing “jump” in the position of background objects.