- The update adds a lens profile.
What changed
Leica has posted firmware notes adding a Summicron-M 66 f/2 lens profile to several M-series cameras. The M11-family release is version 2.6.4 and includes the M EV1. Separate M10-family notes list model-specific versions. Leica Rumors reported the releases on September 14, linking directly to Leica's downloads.
Why it matters
The practical development is continued lens-profile support across multiple camera generations. Owners need to match the release to their specific body: similar family names do not mean that one firmware file fits every model. The primary notes make that distinction clearer than a single umbrella version number would.
What remains unproven
The documents do not quantify image-quality changes or establish wider performance improvements. They also lack a visible publication date, so chronology rests on the dated report. This synthesis has not installed or tested the firmware.
Read beyond this page.
Recorded source-check date: 15 Sep 2026. A link is not, by itself, evidence that every claim has been independently verified.
Changes & version history
Version 3 · 15 Sep 2026
Scheduled release of checksum-bound AI-assisted editorial review
Version 2 · 15 Sep 2026
Checksum-bound editorial review scheduled for release
Version 1 · 15 Sep 2026
Source-linked private review edition