Leica SL3-S firmware

Firmware history

1. Version 4.2.0 Latest First seen Jul 7, 2026
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   LEICA SL3

   LEICA SL3-S

   FIRMWARE UPDATE 4.2.0

   NEW

   • False Color (Video):

   New assistant for color-coded rendering of brightness values directly in Live View. It allows a precise exposure evaluation, specifically for skin tone.

   • HDMI mirroring including user interface:

   The camera monitor can now be mirrored via HDMI, including all onscreen icons. A new menu option ( Mirror via HDMI) allows easy activation/deactivation of this function.

   • Lens Profile:

   Support for the new Leica Noctilux-M 1:1.2/35 ASPH.

   • Extended AF subject detection (vehicle):

   Two options have been added to the menu AF Detection to allow for vehicle detection. The user can specify the detection of entire vehicles or specific vehicle parts.

   IMPROVEMENT

   • Revised video settings selector:

   The video format selection was fundamentally optimized. A new filter system now facilitates finding the correct settings significantly faster and more conv​eniently.

   • Firmware update display:

   All update-relevant messages will now be displayed automatically displayed on screen regardless of the EVF/LCD setting.

   • New “full screen mode” in Review mode:

   In addition to the existing profiles, a new view is now available that displays the image without any information or icons. This view appears between Info Profile 4 and Info Profile 1.

   • Optimized Leica Looks user interface:

   The Leica Looks interface for adjusting individual parameters was revised for additional ease of use. Settings can now be adjusted more quickly and more intuitively.

   • Lens lists:

   The M- and R-lens lists will no longer be stored in the user profile. These settings will therefore remain accessible from within any profile.

   • Optimized electronic shutter response time:

   The shutter release lag during continuous shooting with the electronic shutter (15 fps and higher) has been significantly reduced, allowing for faster image capture more when the shutter button (S2) is pressed down fully.

   • Improved Tracking Framelines display:

   In AF Mode, Tracking will display the framelines in the color of the respective detection status. Green markers will show that the camera has successfully completed focusing if no perso​n or animal is detected.

   TROUBLESHOOTING

   • A problem with vignetting correction in combination with the “Leica Noctilux-M 1:1.2/50 ASPH.” lens profile was fixed, which could previously result in incorrect over-compensation.
   • An issue was resolved where icons in the Control Center (CC) could be missing after importing user profiles.
   • A bug was fixed that could cause horizontal red lines to appear in the EVF under certain lighting conditions when the shutter button was pushed to the first pressure point (S1) (SL3 only).
   • The Stabilization option was removed from the function list for FN buttons to avoid misunderstandings. Instead, the only selectable option is now Image Stabilization.
   • An issue was corrected where the audio level meter for the left channel in Video Mode would – under certain conditions – show incorrect peaks.
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