Sigma Lens Accessories | Sigma Ud-01Na Usb Dock For Nikon F-Mount Lens (Select Sigma Art, Contemporary, Or Sports 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.