Teamed with enhanced tracking AF, the upgraded lens is now even more suitable for capturing stills and Full HD video of fast-moving subjects.

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In addition to an infrared camera and projector, the Kinect features a microchip that performs "skeletal tracking, " or following movement without using a camera lens.

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An infrared camera in each lens then picks up those signals and uses them to coordinate the location of your pupils, tracking what you're looking at.

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