Sigma 45mm F2.8 DG DN | Contemporary (L-Mount)
firmware v1.7
Sigma · Released Mar 18, 2026 · First seen Jul 5, 2026
v1.7 is the latest firmware for the Sigma 45mm F2.8 DG DN / Contemporary (L-Mount), released March 18, 2026.
In short — summary by updatemystuff.com
Adds configurable focus ring functions and T-stop display option for video recording.
- Assignable focus ring functions during autofocus
- Adjustable focus ring rotation direction during manual focus
- T-stop display option for video
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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