Sigma UD 11 USB Dock Station for External Hard Drives & SSDs - High-Speed Data Transfer, Plug & Play - Perfect for PC, Mac, Laptop & Desktop Computer Setup

Designed exclusively for use with a SIGMA Contemporary, Art, or Sports lens and its accessories, the Sigma UD-11 USB Dock allows users to update firmware and customize settings on lenses in these lineups. You can update lens firmware as well as adjust the amount of focus movement and MF timing when operating the focus ring in the conjunction with Sigma's Optimization Pro Software.