Nikon Corporation introduced this camera early January 2016 as the DX-brother of the Nikon D5. It has, indeed, almost the same number of pixels (20.9) but packed on a DX-format CMOS sensor (23.5 x 15.7 mm ). Also the ISO-settings are revolutionary high: ISO 100 up to ISO 51,200 + 5EV = ISO 1,640,000 !!
See for more details the matrix.