4K – A shorthand reference to the 4096 x 2160 pixel image of digital cinema projection.

4:3 – The aspect ratio for standard-definition television. Four units wide by three units tall – more square in its visual presentation than the widescreen high-definition 16:9 video display.

16:9 – The aspect ratio for high-definition video. Sixteen units wide by nine units tall – a widescreen display.

30-Degree Rule – A cousin to the 180-degree rule, this rule suggests that when recording coverage for a scene from differing camera angles within the film set, the camera should be moved around the 180-degree arc by at least 30 degrees from one shot to the next to create enough variation on the angle on action so that the two different shots ...

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