Sigma 100-400mm F5-6.3 DG DN OS Firmware Update Ver.02

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Timothy Mayo

Original poster
Pro Member
Pro Member
Mar 1, 2020
United Kingdom
Sigma has released firmware Ver.02 for their 100-400mm F5-6.3 DG DN OS | Contemporary lens for Sony E-mount.

The firmware addresses the two following issues:

・It has improved the phenomenon whereby the lens’s optical stabilizer effect differs depending on the shutter type and drive mode used.
・It has corrected the phenomenon whereby the lens firmware cannot be updated via the camera.

Unfortunately it seems that the firmware cannot be updated from Ver.01 to Ver.02 by the end-user via the camera. Therefore, Sigma will update the lens firmware free of charge. Of course, this unfortunately means that you will nee to send the lens off to them, and will most likely incur a hefty shipping charge when you add the shipping insurance.

Further details are available in this post on Sigma’s website. And details of your local Sigma authorized service station can be found at

I find it quite bizarre that in 2021 a lens needs to be returned to the manufacturer to update the firmware, and I suspect that many existing owners might not want to go to the trouble if they aren't experiencing any issues.

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