Lens manufacturer Sigma has issued an update to the firmware of its USB dock to make it compatible with the new 150-600mm f/5.6-6.3 DG OS HSM S and 18-300mm f/3.5-6.3DC Macro OS HSM lenses. Although these lenses are available in Sigma, Canon and Nikon mounts, the update for the USB dock does not yet cover these lenses in the Nikon fit, and Sigma hasn't indicated when it will. The USB dock itself was originally only available for Sigma and Canon fit lenses, with Nikon catching up later, and this may be the case again – that the Nikon update will come soon.

Sigma's USB dock is designed to allow users of Sigma's new Global Vision Art, Sport and Contemporary lenses to adjust the behavior of their lenses using Sigma's Optimization Pro software. The USB dock is the means to connect the lens with the software via a PC. The dock makes it possible to update a lens' own firmware, as well as customize the focus setting of the lens. In models from the Sport line AF speed and range can also be altered, enhanced or limited, as can the behavior of the Optical Stabilization system. Owners of the new Art 50mm f/1.4 DG HSM can also switch on or off full-time manual focus and dictate the degree of rotation required to activate the mode.

Although part of the Global Vision range, and designated Art lenses, Sigma's DN lenses for Micro Four Thirds and Sony E-mount are also not compatible with the USB dock.

For more information on the Sigma USB Dock and to download the firmware update visit Sigma's website.