Sigma 35mm F2 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 35mm F2 DG DN / Contemporary (L-Mount): the current version is v1.5 (March 18, 2026). Go to v1.5

In short — summary by updatemystuff.com

Adds focus ring control compatibility, reduces AF drive sound, and improves shutter lag.

Adds focus ring control compatibility with linear or non-linear focus mode selection
Reduced AF drive sound
Improved shutter lag during AF; manual focus scale bar display optimized

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 reduces the AF drive sound.
It optimizes the scale bar display during manual focus.
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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