Thank you for purchasing and using our products.

We would like to announce the availability of a new firmware update for the following SIGMA mount lenses.The lens firmware updates improves the AF speed when it is mounted on the SIGMA sd Quattro series and SIGMA MOUNT CONVERTER MC-11 SA-E.For customers who own the following applicable products and the SIGMA USB DOCK, please update the lens firmware using SIGMA Optimization Pro.

Applicable products
SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary SIGMA
SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary SIGMA
SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary SIGMA

Benefits of this firmware update
It has improved the AF speed of these lenses when mounted on the SIGMA sd Quattro series.
It has improved the AF accuracy when these lenses are attached with the SIGMA MOUNT CONVERTER MC-11.

Before updating the lens firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh from the following download page.

SIGMA Optimization Pro Download page
http://www.sigma-global.com/en/download/lenses/sigma-optimization-pro/

For further assistance please contact Sigma Imaging (UK) Ltd Service Department by emailing service@sigmauk.comor telephoning 01707 329 999

We appreciate your continued support for our company and products.