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The radar beam. hits oncoming cars, and is reï¬ected back. to the radar unit, which can calculate. speeds from those reï¬ections. Radar can be used from a police car. thatâs either stationary or moving, since. it does not require precise aiming to. clock traï¬c speeds. There are also hand-. held units that can be operated from a. car, motorcycle, or an oï¬cer standing at. the side of the road.
Tips for capturing movement: 1. Slow Down Your Shutter Speed. The reason for movement blur is simply that the amount of time that the shutter of a camera is open is long enough to allow your cameraâs image sensor to âseeâ the movement of your subject.So the number one tip in capturing movement in an image is to select a longer shutter speed.uckily this isnât as hard as you might think because shutter speed and aperture settings are organized in âstopsâ. As you decrease shutter speed by a âstopâ you double the amount of time the shutter is open (eg â from 1/250 to 1/125).