The D5200 gets a processing boost over its predecessor. Nikon touts its EXPEED 3-branded processor as offering higher speed, better color reproduction and improved noise reduction. The D5200 also has an updated, cleaner design to the on-screen user interface that presents more information in a more-logical layout. This is welcome on a small camera with relatively few external controls since much of the user interaction is, by necessity, via the rear screen ( and lots of button pressing) .
The D5200 also supports Nikon’s WU-1a Wi-Fi unit, which plugs into the camera’s accessory terminal and allows images to be transmitted wirelessly to a smartphone or tablet for uploading to social media