Panasonic LUMIX has announced new firmware updates for its full-frame mirrorless LUMIX S1RII, S1II, and S1IIE. The most important update is the addition of an improved thermal control algorithm that is claimed to allow users to record for longer periods of time without overheating issues.
The LUMIX S1RII Firmware Ver. 1.3 / S1II Ver. 1.2 / S1IIE Ver. 1.2 Firmware updates will be available from 26th November 2025.
Key enhancements
- Improved thermal control algorithm for longer recording times, reducing the impact of environmental factors
- New lower-speed option for SH burst shooting, including pre-burst modes (S1II and S1RII only)
- Autofocus enhancements, including auto-recognition frames for the main subject, a rectangular AF frame for human eye recognition, and improved tracking stability. Enhanced tracking AF stability through algorithm improvements.
- New MP4 (Lite) video format option: 3.8K (3840×2560) 29.97p/25.00p at 50Mbps
- Support for LUMIX Flow App Ver. 1.4, adding LUT application to live view, multiple frame markers and focus frame display when using the external monitor function
Other Features
- Compatibility with LUMIX interchangeable lens S-R100500 and teleconverter (DMW-STC14/STC20) has been improved.
- Support for LUMIX Smartphone App, LUMIX Flow Ver.1.4: External monitor function allows applying LUTs to live view, displaying multiple frame markers, and showing focus frames.
- An icon indicating that the preview effect is disabled will be displayed on the shooting screen when [Constant Preview] is set to [OFF].
- ISO Auto can be set in the [ISO Displayed Setting] menu in the Custom Menu.
- A bug where the live view quality differed between standby mode and video recording mode when applying false color has been fixed.
- Added a 1.6x display option for the Anamorphic Desqueeze Display.
- The base ISO sensitivity can now be visible on the ISO sensitivity setting screen when Dual Native ISO is set to AUTO.
- The default setting for functions registered to the sub video rec. button has been changed to “No Setting” in both Photo Mode and Playback Mode.
- The processing time for focus stacking has been improved through algorithm enhancements.
- A menu that allows you to display the live view with the same quality during both standby and video recording modes has been added (S1II only).
LUMIX Smartphone App, LUMIX Flow Ver.1.4
- Support for LUT view assist – LUT live view is available in the app and can be toggled ON or OFF.
- Support for multiple frame marker display – The same frame markers shown on the camera is output to the app as live view.
- Improved AF frame display for various recognition in Automatic Detection
