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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.
4. Use the Shutter Speed Priority Mode. Motion blur is all about shutter speed. To bring out the motion in the backdrop and keep the subject in focus, start with a shutter speed of 1/200th of a second and slow down gradually depending on the results and the speed of the subject.This will help you to determine the optimum shutter speed for motion blur in those conditions.o bring out the motion in the backdrop and keep the subject in focus, start with a shutter speed of 1/200th of a second and slow down gradually depending on the results and the speed of the subject. This will help you to determine the optimum shutter speed for motion blur in those conditions.