Canon has removed the firmware v1.2.0 download for the Canon EOS R3 due to a bug in the software.

The bug is described on the DPReview Forum

The issue is that if you have v1.2 on your camera and then perform a reset the mode dial does not work correctly and you cannot change between Tv Av etc

If you have updated to firmware v1.2.0 for the Canon EOS R3, do not do any resets until v1.2.1 is released.

Canon has always fixed these sorts of firmware bugs pretty quickly, so I would expect an update very soon.

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42 comments

  1. Another example of why I wait a few weeks to install new computer OS updates and camera firmware updates.
    Good luck with that on Windows 11 (Mac people are more fortunate as I understand).
  2. Another example of why I wait a few weeks to install new computer OS updates and camera firmware updates.
    Was just going to say the same thing. No sense in being the Guinea Pig for these experiments.
  3. After they remove the function to shoot 50 frames at a195 fps in the update, maybe I can sell bootlegged copies of the firmware since to those who do not mind a few bugs in trade for insane fps.
  4. Another example of why I wait a few weeks to install new computer OS updates and camera firmware updates.
    A sensible approach, although some bugs slip through testing and are only found post-deployment as a result of end users doing their thing - but it's always better that someone else finds it before you!
  5. SO if we dont do a factory reset we are cool?
    I guess I'll find out. I saved my settings to the card before sending the body in. I'll see what happens when I load the card.
  6. I updated the R3 with FW 1.2, before being pulled, and didn't reset the cam. I usually switch between the custom saved modes and shoot. So far the mode dial and the rest of functions including Hc frame rate are ok.
  7. And this folks is what happens when cameras become heavily dependent on computing, the increase in functionality comes at the cost of an increase in complexity. Along with this comes an increasing number of variables that are difficult to account for whenever changes and updates are made. Without a proper testing environment and time to carry out exhaustive tests, the consumers/end-users become the beta testers.

    Now just like your personal computer, cameras can have software (firmware) bugs, and they also freeze up and require power disconnection (battery removal) to get them running again. As more computing functionality gets added, expect much more of this. Anyone who has ever worked in the IT industry will tell you this is a immutable aspect of computing technology.

    As I always keep reminding people, there is always a cost for everything. The personal choice is if you're happy with the tradeoffs.
  8. And this folks is what happens when cameras become heavily dependent on computing, the increase in functionality comes at the cost of an increase in complexity. Along with this comes an increasing number of variables that are difficult to account for whenever changes and updates are made. Without a proper testing environment and time to carry out exhaustive tests, the consumers/end-users become the beta testers.

    Now just like your personal computer, cameras can have software (firmware) bugs, and they also freeze up and require power disconnection (battery removal) to get them running again. As more computing functionality gets added, expect much more of this. Anyone who has ever worked in the IT industry will tell you this is a immutable aspect of computing technology.

    As I always keep reminding people, there is always a cost for everything. The personal choice is if you're happy with the tradeoffs.
    they probably just need better programmers. Canon is a camera company i cant see the software being that complicated compared to cellphone tech. the issue seems like a simple fix.

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