Sometimes someone asks me how it is with Sigma lenses and focusing on different bodies. That they had heard of cases where Sigma did not focus properly nd that someone had to have it serviced, and so on and so forth. I'm always happy to advise that before drilling into the microadjustments of the lens or giving the camera and a lens to adjust, it's a good idea to update the firmware in the lens. When you have a lens made in 2015, for example, and you buy a new body made in 2020, it must be clear that the firmware in the lens in 2015 certainly had no idea that a new body would come. That's why Sigma constantly improves, updates and releases new versions of the firmware for their lenses. In the end, when you put Sigma in the service for adjustment, 95% of them will just update your firmware and everything works as it should. But why wait for service when you can update the firmware yourself using the following few steps. Just buy a dock for your bayonet. It is usually around a thousand czech krown in price, sometimes I see somewhere that sellers give it for free with the lens. Or you can borrow it.
1. Connect the Sigma dock to the computer
2. Go to Sigma-global.com and download Sigma Optimization Pro - direct link here
3. Install the program to a PC
4. Start Sigma Optimization Pro
5. The program verifies the update for the dock (which is not because you have installed the current version). If the Sigma dock is working properly, the green circle labeled Connected lights up in the upper right corner
6. Attach your lens to the dock
7. The program automatically searches for updates and, if available, asks you to install them. Confirm "Yes"
8. Read the warning that you have nothing to turn off, disconnect and play with anything during the update and confirm "Agree"
9. The lens will be updated
10. After the update, the Sigma dock will check again if there is any other update available (if so, you will proceed again from step 7)
11. Sigma dock let you know that the update is complete and that we can disconnect the lens
12. Done! Every Sigma lens can still be tuned (especially autofocus), but it's the story for the next time.