About USB DOCK

By connecting a SIGMA Art, Contemporary, or Sports lens to a computer with the SIGMA USB DOCK, photographers can update the lens firmware and adjust focus position and other parameters. Exclusive SIGMA Optimization Pro software makes customization easy. It is possible to select the autofocus speed and adjust the focus limiter and Optical Stabilizer (OS) function. Features

Multiple focus setting options are available: 4 categories for fixed focal length lenses, and 16 categories (4 options for focal length) x (4 options for shooting distance) for zoom lenses.