Sigma USB shipping Dock for Canon

Product Name: Sigma USB shipping Dock for Canon
Sigma USB Dock Micro Tune, Customize, And Update Your Lens 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 shipping 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.