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Sigma has announced a firmware update for its SIGMA 100-400mm F5-6.3 DG OS HSM Contemporary lens for Canon mount. Version 1.02 of the firmware fixes problems with the optical image stabilization when the lens is attached to Sigma’s Sony E-mount converter MC-11 EF-E.
As usual, users who own the Sigma USB dock can update the firmware via the Sigma Optimization Pro software. Users who own the MC-11 converter can update by connecting the latter to a computer via USB-cable. In both cases, you should make sure you are running the latest version of Sigma Optimization Pro which is 1.4.1 for Windows and 1.4.0 for Macintosh computers.
Articles: Digital Photography Review (dpreview.com)