Sigma 17mm F4 DG | Contemporary (L-Mount)
firmware v1.2
Sigma · Released May 21, 2026 · First seen Jul 5, 2026
v1.2 is the latest firmware for the Sigma 17mm F4 DG / Contemporary (L-Mount), released May 21, 2026.
In short — summary by updatemystuff.com
Focus ring customization options added for autofocus and manual focus, plus T-stop display option for video recording.
- Assignable functions for 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.
Was this useful? Thanks.
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.
updatemystuff.com never hosts firmware files — always download from the official source.
Get it from SigmaWatch the 17mm F4 DG | Contemporary (L-Mount) for updates
Create a free account and get an email the moment Sigma publishes new firmware.
Create account & watchSee the full firmware history for the 17mm F4 DG | Contemporary (L-Mount)