what i learnt at the start of LO2

Since starting LO2 I have learnt that: Advertising on TV began on July 1st 1941 first in the United States just before a Brooklyn Dodgers Baseball game. The rule of thirds is a concept in video and film production in which the frame is divided into into nine sections. This creates reference points which act as guides for framing the image. Estimates of audience size and composition are often called “ratings” data. The exposure they document is valued as a gateway to further media influence, whether it's educating or entertaining the public or selling products and political candidates or ideas. "Depth of field (DOF)" refers to the range of distances from the camera at which acceptably sharp focus can be obtained. This is a very important concept in video work, for two reasons: You really need to understand DOF to have full control over your focus. Medium shutter speeds (1/20 of a second to 1/80 of a second) can be used to create motion blur when photographing moving objects.