Every Picture is Important

A cinema has 24 or 25 pictures in each second, and sometimes a scene can be having many pictures lasting only a second or a few secs.  For each of these pictures there is composure, lighting, action and meaning. Also they have their points of attention - don't know about the term but meaning the point in the picture where your attention is drawn, and which in the next picture is in about the same point. If you have a film of 120 minutes how many pictures there can be to light and compose...