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How Modern Ultrasonic Autofocus System Actually Work | Camera Lenses Explained #tech #photography
Modern autofocus systems typically use phase detection. The camera splits incoming light into two separate beams and compares them. If the beams do not align perfectly, the camera knows the subject is out of focus and calculates which direction and how far the lens must move to correct it. Ultrasonic motors are generally faster and ideal for ...
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