Sigma 30mm F1.4 DC DN | Contemporary (L-Mount)
firmware v1.4
Sigma · Released May 21, 2026 · First seen Jul 5, 2026
v1.4 is the latest firmware for the Sigma 30mm F1.4 DC DN / Contemporary (L-Mount), released May 21, 2026.
In short — summary by updatemystuff.com
Adds focus ring customization options and T-stop display for video recording.
- Assign custom functions to focus ring during autofocus
- Adjustable focus ring rotation direction for manual focus
- T-stop display option for video recording on supported cameras
Written from Sigma's release notes, which are printed in full below.
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What's in this update
- Specific functions can now be assigned to the focus ring during AF.
- The rotation direction of the focus ring during MF can now be set.
- Aperture values can now be displayed as T-stops during movie recording.
- Only on supported cameras.
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