Even the advanced two-stage focusing system has made its way from the T4i, which utilizes both phase-difference and contrast AF in order to achieve focus more efficiently when capturing video.

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The F900EXR automatically switches between Phase Detection AF and Contrast Detection AF depending on the subject and scene, guaranteeing superb ease-of-use and fast, accurate autofocus no matter what the setting or shooting conditions.

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When in Live View or recording video, contrast detect AF quickly acquires, and can even track focus through the frame.

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Using contrast based AF, the D3100 automatically focuses on subjects when Live View is activated to aid shooting when using the LCD.

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While recording, the contrast detect AF system has the ability to use normal or wide area AF, track a subject through the frame, or use face priority AF to make sure faces are always in focus.

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