Sigma USB Dock for Nikon

● SIGMA USB Dock is a lens accessories exclusively for Contemporary, ART, and Sports Line, which can connect to a PC via a USB cable to update the lens firmware and adjust the focus position. ● Each adjustment is made with dedicated software (Sigma Optimization Pro).In addition to the firmware update, adjusting the focusing position, the Sports line lens equipped with a custom mode switch can be selected, the focus rimiter adjustment, and the OS can be adjusted.