Sigma 24mm F3.5 DG DN | Contemporary (L-Mount) firmware `v1.2`

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

v1.2 is not the latest firmware for the Sigma 24mm F3.5 DG DN / Contemporary (L-Mount): the current version is v1.4 (May 21, 2026). Go to v1.4

In short — summary by updatemystuff.com

Adds focus ring control with linear/non-linear options and reduces shutter lag during autofocus on Leica SL2.

Introduces manual focus ring control feature with selectable linear or non-linear movement
Improves autofocus shutter lag phenomenon on Leica SL2

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.
It improves the phenomenon of an occasional, slightly increased shutter lag during AF shooting when used in combination with the Leica SL2.

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