The Nikon D5200 is the upgrade to Nikon’s best selling D5100. The main improvements on the D5100 is a 24.1 megapixel DX-format CMOS sensor, an upgraded AF system plus the D5200 is compatible with the optional Nikon WU-1a WiFi module. Other features include a 3-inch vari-angle monitor, 2,016-pixel RGB metering sensor, 16 scene modes, small, lightweight body.