SL2-S firmware v4.0
Leica · First seen by GearPulse Jul 7, 2026
What's in this update
LEICA SL2-S
Firmware update
EN 2
FIRMWARE
Camera model Firmware version
Leica SL2-S 4.0
PHOTO
_NEW: Perspective control
VIDEO
_NEW: The incremental value for a direct setting of the ISO value can now be selected via the setting wheels
(1 EV, 1⁄2 EV, 1⁄3 EV, or 1⁄6 EV)
PHOTO/VIDEO
_NEW: The lens profile menu has been supplemented with additional focal length settings
_NEW: The dropdown list for FN button assignments is now customizable and has been extended
_DETAILED: Supported lenses
_IMPROVED: In some cases, the lens Exif information is missing for third-party lens adapters
_CORRECTED: In some rare cases, the functions Pair and Delete were no longer available in the Leica FOTOS
menu, once the connection was disabled
_CORRECTED: Some minor issues with the newly introduced function Toggle Focus Point have been remedied.
The focus positions are now saved correctly.
EN 3
FIRMWARE UPDATES
Leica is continuously working on the further improvement and
optimization of your camera. Since many camera functions are
entirely controlled by software, some of these improvements and
additions to the functional scope can be installed in retrospect.
Leica offers firmware updates at irregular intervals, which you can
download from our website.
Leica will notify you of any new updates, once you have registered
your camera. Users of Leica FOTOS will also be automatically noti-
fied about firmware updates for their Leica cameras.
There are two options for installing firmware updates.
–conveniently via the Leica FOTOS app
–directly via the camera menu
Finding the currently installed firmware version
▸Select Camera Information in the main menu
• The current firmware versions are displayed.
More information about registering, firmware updates and how to
download them to your camera, as well as any amendments and
additions to this manual can be found in the customer area of our
website at:
https://club.leica-camera.com
EXECUTING A FIRMWARE UPDATE
Any interruption of a running firmware update may cause seri-
ous and irreparable damage to your equipment!
You will therefore have to take particular note of the following,
when carrying out a firmware update:
• Do not switch off the camera!
• Do not remove the memory card!
• Do not remove the rechargeable battery!
• Do not detach the lens!
Notes
• A warning message will appear if the battery is insufficiently
charged. Recharge the battery and then repeat the process
described above.
• You will find additional device and country-specific registration
marks and numbers in the Camera Information submenu.
EN 4
PREPARATION
▸Fully charge and insert the rechargeable battery
▸The second SD memory card (where applicable) must be re-
moved from the camera
▸Any stored firmware files on the memory card must be removed
• We recommend saving any images on the memory card and
reformatting it before the update.
(Caution: Loss of data! All data stored on the memory card
will be lost during formatting.)
▸Download the latest firmware version
▸Save the download to the memory card
• The firmware file must be stored in the main directory of the
memory card (not in a sub-directory).
▸Insert the memory card into the camera
▸Switch the camera on
UPDATING THE CAMERA FIRMWARE
▸Preparation
▸Select Camera Information in the main menu
▸Select Camera Firmware Version
▸Select Start Update
• A prompt with information about the camera is displayed.
▸Check the version information
▸Select Yes
• The prompt Save profiles on SD Card? appears.
▸Select Yes/No
• The update will start automatically.
• The lower status LED will flash during this process.
• Once the process has completed successfully, a relevant on-
screen message and prompt to restart the device will appear
on screen.
▸Switch the camera off and on again
Note
• Date & time, as well as the preferred language will have to be
set up again after the restart. Relevant prompts will appear on
screen.
EN 5
UPDATING THE LENS FIRMWARE
Where available, firmware updates can be performed for Leica SL
lenses and for all other lens types by L-Mount Alliance.
Firmware updates for Leica SL lenses are generally uploaded
alongside the latest version of the camera firmware and will not
have to be implemented manually. Provided an SL lens is attached
during the camera update, it will automatically receive the latest
firmware version. Where that is not the case, a relevant prompt
will appear when a lens is attached to a camera with updated firm-
ware for the first time.
The instructions provided for camera firmware updates apply.
▸Preparation
▸Select Camera Information in the main menu
▸Select Lens Firmware Version
▸Select Start Update
• A prompt with information about the camera is displayed.
▸Check the version information
▸Select Yes
• The update will start automatically.
• The lower status LED will flash during this process.
• Once the process has completed successfully, a relevant on-
screen message and prompt to restart the device will appear
on screen.
▸Switch the camera off and on again
EN 6
PERSPECTIVE CONTROL
This assist function displays a frame showing the expected
cropped section of the image after a correction of the perspective
of vertical falling lines. Perspective Control helps to achieve a gen-
erally straighter vertical line and straight horizon, which ensures a
natural image effect, specifically in architectural images.
The function “Perspective Control” calculates the image section
and the required distortion correction based on the actual panning
angles of the camera and the lens used. In effect, the camera ori-
entation during recording (determined by internal camera sensors)
is the decisive factor and not the lines visible in the image object.
The function is therefore unlike automatic perspective control
features used for post-editing, which are generally based on the
image content.
The functionality depends on the picture format used (JPG or
DNG). For JPG format images, the correction occurs directly in
the camera and the corrected image is stored. For DNG format
images, the relevant information is written to the meta data of the
original image. Image correction is done later on using a program
like Adobe Photoshop Lightroom
®
or Adobe Photoshop
®*
.
Factory setting: Off
*
See p. 8 for more information.
Notes
• In case of large panning angles, the distortion correction needed
for a complete perspective control would be too extreme. That is
why this function is automatically skipped or only partially used
where angles are too large. In that case, we recommend creating
DNG format images and effecting the desired corrections in a
post-editing step.
• While Perspective Control is active, the auxiliary displays for
Level Gauge, Histogram and Grid, as well as the function Auto
Review will be temporarily disabled.
• Perspective Control is not available for continuous shooting or
for Multishot.
• All data edits will be written to the meta data of DNG shots,
even if the function is deactivated. If the function is active, then
a special tag is added, which recommends the edit to supported
image editing software.
EN 7
▸Select Perspective Control in the main menu
▸Select On
ACTIVE PERSPECTIVE CONTROL
DETECTED PERSPECTIVE IN SHOOTING MODE
CORRECTED PERSPECTIVE IN REVIEW MODE
EN 8
JPG FORMAT IMAGES
For JPG format images, the correction occurs directly in the camera
and only the corrected image is stored. Any image content outside
the frame will be lost.
DNG FORMAT IMAGES
In DNG format, the entire sensor image is stored unchanged. The
data calculated by Perspective Control is written to the meta data
of the image. Image correction is done later, using appropriate
software like Adobe Photoshop Lightroom
®
or Adobe Photoshop
®
*.
A corrected preview version of the image (thumbnail) is displayed
in Review mode. The same applies for automatic review directly
after the image is taken.
However, when opening the file in Adobe Photoshop Lightroom
®
or Adobe Photoshop
®
, the original recording will be dis
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