Sigma has released a firmware update for its 150-600mm f/5.6-6.3 DG OS HSM lenses, which it claims increases AF speed by up to 50%.

Customers can install the free firmware update via a Sigma USB dock (using Sigma Optimization Pro software) or by contacting the company directly (for details, see below). The update applies to both the Sports and Contemporary versions of the Sigma 150-600mm f/5-6.3 DG OS HSM, in Canon and Nikon mounts. For further details visit www.sigma-global.com/download/en.

Press release

We would like to announce the availability of a new firmware update for the SIGMA 150-600mm F5-6.3 DG OS HSM | Sports in Canon and Nikon mount, and the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary in Canon and Nikon mount. This firmware update can be installed using SIGMA Optimization Pro, the dedicated software for the SIGMA USB DOCK.

Benefit of this firmware update
The latest firmware update improves the AF algorithm of 150-600mm F5-6.3 DG OS HSM lenses and further enhances AF speed by optimizing HSM (Hyper Sonic Motor) drive control. Depending on shooting conditions, it is expected to increase autofocus speed by approximately 20%, to a maximum of 50%, during normal shooting as well as when using “Speed Priority” set through SIGMA Optimization Pro.

For customers who own the SIGMA USB DOCK and applicable products listed below, please update the firmware using SIGMA Optimization Pro. Please ensure SIGMA Optimization Pro is updated to Version 1.2 before updating the lens firmware.

For customers who do not own a SIGMA USB DOCK, please contact Sigma Imaging (UK) Ltd for details about updating the firmware free of charge.

SIGMA Optimization Pro Download page www.sigma-global.com/download/en.