MICRO TUNE, CUSTOMIZE, AND UPDATE YOUR LENS Update Lens Firmware Customize: Autofocus, OS, Focus Compatible with Global Vision Lenses (except DN lenses) The Sigma USB dock works in conjunction with Sigma Optimization Pro software in order to connect a photographers lens to their personal computer to update firmware and other parameters such as focus, and for the Sports category: Autofocus speeds, focus limiters, and optical stabilization functionality. Updating the firmware can be done via the internet. Sigma Photo Pro is available for Mac and PC computers. Focus Settings: 4 Categories of customization for fixed focal length. 16 Categories of customization for zoom lenses (4 options for focal length) x (4 options for shooting distance). Sports Line: AF Speed: 3 adjustment modes. Focus Limiter: Customize auto focus range. OS: 3 adjustment modes. The Sigma Optimization Pro can be downloaded at the Sigma Global Vision site . USB DOCK COMPATIBILITY CHART LENS Product Line Firmware Update Focus Setting OS AF Speed Focus Limiter DG 35mm F1.4 DG HSM Art O O X X X 120-300mm F2.8 DG OS HSM Sports O O O O O DC 17-70mm F2.8-4 DC MACRO OS HSM Contemporary O O X X X 30mm F1.4 DC HSM

O O X X X 18-35mm F1.8 DC HSM Art O O X X X OS Function, AF Speed and Focus limiter are only adjustable with the lenses with a custom mode switch **DN Lenses are no compatible with the USB dock currently.