Sigma 45mm F2.8 DG DN | Contemporary (L-Mount) firmware `v1.4`

Sigma · Released Jan 20, 2022 · First seen Jul 5, 2026

v1.4 is not the latest firmware for the Sigma 45mm F2.8 DG DN / Contemporary (L-Mount): the current version is v1.7 (March 18, 2026). Go to v1.7

In short — summary by updatemystuff.com

Adds focus ring control function with selectable linear or non-linear manual focus movement.

Enables focus ring control with linear or non-linear focus movement selection
Compatible with SIGMA fp L, fp, and multiple Panasonic and Leica L-Mount cameras
Some cameras require firmware updates before this feature is supported

Written from Sigma's release notes, which are printed in full below.

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It introduces compatibility with the “focus ring control” function of the camera, allowing either “linear” or “non-linear” focus movement to be selected when using MF.
SIGMA fp L , SIGMA fp, Panasonic Lumix S1, Lumix S1R, Lumix S1H, Lumix S5, Lumix BS1H, Leica SL2, SL2-S are supported.
SIGMA fp L will be supported by updating to firmware Ver.2.00 scheduled to be released in the near future, and SIGMA fp will be supported by updating to firmware which is scheduled to be released in April.
For more information on linear and non-linear focusing, please refer to our frequently asked questions.

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