Canon EOS R3, EOS R5MK2 and More Firmware Updates September 2025

During my last few days in Greenland (I am currently in Iceland wrapping up the extension trip), Canon updated firmware for the EOS R3, EOS R5MK2 and many other cameras in the line-up. Most of the updates are bug fixes, although some cameras got support for the new LP-E6P. You can download firmware updates through the Camera Connect app or directly from a Canon website. Personally, I find the Canon Camera Connect app to be the easiest and fastest. I updated my R3 in the field in less than ten minutes with my iPhone while waiting for the clouds to gather after the morning shoot here in Iceland.

Firmware Updates:

Canon Release New Firmware for Big RF Glass April 2024

Canon has released firmware updates to five RF-mount telephoto lenses.

Even with fast zoom operations, it is now easier to focus (RF 100-300 f/2.8L IS USM Only). The electronic shutter system has improved the control of the panning assist after the second continuous shot.

I am unsure exactly what ‘easier to focus’ means in Canon’s vernacular. Perhaps they mean quicker or better to focus? Or Both? In any case, that comment only applies to the new 100-300mm f2.8L IS RF lens. The other note concerns all the telephoto lenses noted above and panning assist – a feature I have only begun to dabble with so far. Nevertheless, it is always recommended that the firmware be updated to the latest.

Iceberg in Antarctica