A few days ago SIGMA published new firmware updates for lenses. The four new editions are models with Canon EF and Sigma SA mounts. The updates are said to have led to improvements concerning the auto-focus as well as to a reduction of the operating noise of the shutter lamellae. Sigma has published firmware updates for four of its lenses with Canon EF and three models with Sigma SA mounts.
There are updates for the following lenses, whereas the first three have been improved for SA and EF bayonet mounts and the 24-105mm lens can be downloaded for Canon EF bayonet mounts only.
17-70mm F2.8-4 DC MACRO OS HSM
18-200mm F3.5-6.3 DC MACRO OS HSM
18-300mm F3.5-6.3 DC MACRO OS HSM
24-105mm F4 DG OS HSM
SIGMA promises an improved AF performance in particular in connection with the lens adapter MC-11, which I’ve already tested for you recently . In connection with Sigma’s sd Quattro cameras the speed of the auto-focus, in particular, is said to have been enhanced.
Another improvement will make all the video enthusiasts among you very happy! With Canon EF mounts, AF exactitude in the LiveView and video modes are said to have been upgraded. Besides that, the operating noise of the shutter lamellae in the video mode was reduced, which has improved the sound while recording videos.
There’s also an update available for the Adapter MC-11. It enables the use of the upgraded lenses.
You can easily find all new firmware versions on the SIGMA website under Support: http://www.sigma-global.com/en/download/lenses/firmware/