December 11, 2025

AtomOS 12.2.1 Firmware Release Notes

Installation Instructions

Detailed instructions on how to install the latest firmware on your device can be found on the firmware download page for your product: www.atomos.com/product-support/

Major updates

• FUJIFILM GFX ETERNA 55 RAW and Open Gate support
• Canon EOS R6 Mark III RAW support
• Sony FX3A camera control support
• Support for 47.85 and 48 fps SDI RAW and HDMI RAW modes

Fixes and improvements

• USB-C Ethernet performance has been significantly improved
• Sigma RAW lock stability issue resolved

See www.atomos.com/ninja-tx-certified/ for supported storage & accessories.