500mm F4 DG OS HSM | Sports (Nikon F mount) firmware v1.01

It has corrected the phenomenon that 3D-tracking does not work when it is attached with TELE CONVERTER TC-1401 on a Nikon DSLR. * For this update, it requires the firmware of the SIGMA USB DOCK for NIKON to be Ver.1.01 or later.* Before updating the firmware of the 500mm F4 DG OS HSM | Sports for NIKON, Please ensure SIGMA Optimization Pro has been updated to Ver1.4.1 or later for Windows, or Ver1.4.0 or later for Macintosh.