Sigma 500mm F5.6 DG DN OS | Sports (L-Mount)
firmware v1.2
Sigma · Released Apr 23, 2026 · First seen Jul 5, 2026
v1.2 is the latest firmware for the Sigma 500mm F5.6 DG DN OS / Sports (L-Mount), released April 23, 2026.
In short — summary by updatemystuff.com
Adds focus ring customization and T-stop display option for video recording.
- Assign custom functions to focus ring during autofocus
- Adjust focus ring rotation direction in manual focus mode
- Display aperture as T-stop value during video recording
Written from Sigma's release notes, which are printed in full below.
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What's in this update
- Added the ability to assign specific functions to the focus ring during AF.*
- Added the option to change the rotation direction of the focus ring during MF.*
- Added the option to display the aperture value as a T-stop during video recording.
- Only on supported cameras.
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