The Sigma 878101 USB Dock Mount, a revolutionary tool designed specifically for Canon lens users. This innovative solution allows you to update your lens firmware, ensuring you're always using the latest technology, without having to send it back to the manufacturer. With the dock mount, you can adjust the focus position to match your camera's unique settings, providing precise auto focusing every time.

But that's not all. This versatile dock mount also enables you to customize various features on Sigma's "Sport" lenses, including autofocus speed and focus limiter distances. This means you can fine-tune your lens to perfectly match your shooting style and requirements.

But wait, there's more! The Sigma 878101 USB Dock Mount also comes with a free download of Sigma Optimization Pro, compatible with both Windows and Mac computers. This powerful software allows you to further optimize your lens performance, customizing settings such as autofocus speed, focus tracking, and more.

Compatibility with Sigma's Global Vision lenses means that this dock mount is suitable for a wide range of Canon lenses. With its sleek and durable design, the Sigma 878101 USB Dock Mount is an essential tool for any serious photographer looking to get the most out of their Sigma lens.