Sigma 120-300mm f/2.8 DG OS HSM (for Canon) Firmware Update Now Available

From Sigma:

Thank you for purchasing and using our products.

We are pleased to inform you the SIGMA 120-300mm f/2.8 DG OS HSM F/CANON Firmware Update is now available.

This firmware update allows you to use the SIGMA USB DOCK with the SIGMA 120-300mm f/2.8 DG OS HSM F/CANON. If you have the products mentioned below, please start up SIGMA Optimization Pro and then operate lens firmware update.

Applicable products: SIGMA 120-300mm f/2.8 DG OS HSM S013 F/CANON

Benefits of this firmware update:

• It has improved the Auto Focus speed of "Standard" and "Speed-priority" modes.
• It has improved the focus accuracy when it is mounted on Canon EOS-1D Mark III or Canon EOS-1D Mark IV.

Please update to SIGMA Optimization Pro Ver1.2 before operating firmware update of SIGMA 120-300mm f/2.8 DG OS HSM S013 F/CANON.

SIGMA Optimization Pro Download Page

Note: Apparently, blogger/photographer JerseyShooter had a big hand in alerting Sigma to the need for this firmware update. Check out his blog for more info.

B&H carries the Sigma 120-300mm f/2.8 DG OS HSM lens and the Sigma USB Dock.