Following up the success of Nikon's D7100 is no easy task, but the D7200 promises some notable feature upgrades. Its 24.2MP APS-C sensor is complemented by an updated 51-point AF system that claims sensitivity down to -3EV. Other enhancements include an increased buffer depth, 1080/60p video, built-in Wi-Fi with NFC and improved battery life. We've put Nikon's claims to the test in our in-depth review.