Sigma has issued updates for ten lenses and mount converters to provide improved AF speed and stabilisation performance.
The new firmware provides three main updates, although they don’t necessarily apply to all the lenses. Seven lenses are covered in the main update, which provides improved AF speed and quality when the lens is used with a Sigma mount and the Sigma Mount Converter MC-21 SA-L:
– 12-24mm f/4 DG HSM A016
– 14mm f/1.8 DG HSM A017
– 24-70mm f/2.8 DG OS HSM A017
– 85mm f/1.4 DG HSM A016
– 100-400mm f/5-6.3 DG OS HSM C017
– 135mm f/1.8 DG HSM A017
– 500mm f/4 DG OS HSM S016
The update for the 100-400mm f/5-6.3 DG OS HSM C017 lens also provides improved the stability of the image in the viewfinder, making it easier to confirm composition, through an updated control algorithm for the Optical Stabilizer. This improvement applies to the Canon mount (Ver. 2.05), Nikon mount (Ver 1.03) and Sigma mount (Ver. 1.03).
The final update applies to the Sigma (Ver. 1.01) and Canon (Ver. 2.02) versions of the 135mm f/1.8 DG HSM A017 lens, which corrects a phenomenon that causes occasional over-exposure when stopping down the lens from f/3.5 while shooting. For Canon mount owners, this problem only occurs when the lens is used on the EOS R camera with either the Mount Adapter EF-EOS R or the Control Ring Mount Adapter EF-EOS R.
Owners of Sigma’s mount adapters can install firmware updates via Sigma’s Optimization Pro software, which can be updated by clicking here. Firmware version 1.17 for the SA-E MC-11 mount converter and firmware version 1.24 for the EF-E mount converter are listed on the same page; scroll down for the EF-E converter firmware. Before updates can be applied, make sure the latest version of the software is installed.
Click here to visit the main page for downloading the lens updates.