The autofocus is one of the factors that sets the D600 apart from the D800, and after the D800’s 51-point system, the 39-point arrangement of the D600 cannot help but feel slightly disappointing. In context, though, it isn’t. For example, Canon’s latest full-frame model will only feature an 11-point AF. The D600’s Multi-CAM 4800 system includes nine cross-type sensors and seven points that work at f/8, making them effective for those photographers working with 2x teleconverter lenses on f/4 optics. In practice, the AF is fast and accurate, and the focus-tracking system works extremely well. The focus mode, as on the D7000, is changed via a neat button press on the auto/manual lever, which then shows in the viewfinder, allowing you to keep your eye on the subject. The only thing it lacks here is the level of fine-tuning that is seen on more advanced systems. Had the D600 featured a more advanced AF system, the camera could have perhaps appealed to more of an action-focused audience, as the D4 does. For general shooting, though, this is more than capable.