Sigma 30mm F1.4 DC 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 30mm F1.4 DC DN / Contemporary (L-Mount): the current version is v1.4 (May 21, 2026). Go to v1.4

In short — summary by updatemystuff.com

Adds manual focus ring control with selectable linear or non-linear focusing behavior.

  • Adds compatibility with focus ring control function
  • Enables selection between linear and non-linear focus movement

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

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What's in this update

  • It introduces compatibility with the “focus ring control” function of the camera, allowing either “linear” or “non-linear” focus movement to be selecte​d 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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Other versions for this product

See the full firmware history for the 30mm F1.4 DC DN | Contemporary (L-Mount)