NIKON FIRMWARE UPDATES D810 & D500, D7200, D750

D500
http://downloadcenter.nikonimglib.com/en/download/fw/227.html
D810
http://downloadcenter.nikonimglib.com/en/download/fw/218.html
D7200
http://downloadcenter.nikonimglib.com/en/download/fw/215.html