Panasonic now offers the DMW‑SFU3A software upgrade key, priced at US $199.99, which enables ARRI-validated Log C3 recording on select LUMIX mirrorless models. When used with updated firmware, the key unlocks Log C3 in the Photo Style or Colour Profile menu.
Supported Cameras & Firmware
The Panasonic ARRI LogC3 (DMW‑SFU3A) activates ARRI Log C3 on the S1R II, S1 II, S1 IIE, GH6, and GH7—all requiring the latest firmware version (S1 series at v1.1/v1.2, GH7 similarly). Firmware v1.2 for the S1R II and v1.1 for the S1 II/E add multiple updates including focus stacking and frame markers—but Log C3 is only enabled with the software key.
What It Actually Does
ARRI Log C3 is ARRI’s log gamma curve, originally designed for Alexa-style sensors. Panasonic’s implementation is certified by ARRI, officially validating the colour science match. This is not a V‑Log derivative or third-party LUT—it is native ARRI encoding, ideal for aligning footage from LUMIX as B-camera alongside ARRI Alexa or other Log C3 outputs.
Production Benefits
On multi-camera shoots using ARRI cameras, integrating LUMIX with ARRI color science reduces grading time and improves consistency without external LUTs. The key enables creative teams to integrate LUMIX footage directly into ARRI-based pipelines. It also delivers Log C3 on more affordable mirrorless bodies—GH6 and GH7—enhancing their usability in larger production environments.
Limitations & Professional Advice
Log C3 exposure latitude and dynamic range gains depend on disciplined sensor exposure and accurate monitoring. The key alone does not guarantee matching color quality—proper calibration and testing remain essential. Professional users should conduct camera comparisons under realistic conditions before committing to critical shoots.
Summary
Panasonic’s US $199 DMW‑SFU3A key brings ARRI-certified Log C3 to five LUMIX models when used with current firmware. It offers native ARRI color science, enabling consistent grading with Alexa-level footage. Good for B-cams and complementing ARRI rigs—provided careful testing precedes adoption.
Testing Reminder: Always test Log C3 footage in your grading pipeline before relying on it in production delivery.
