topic Re: "Reinstalling" latest R5 firmware upgrade in EOS DSLR & Mirrorless Cameras

"Reinstalling" latest R5 firmware upgrade

tomshield — Thu, 31 Jul 2025 20:47:55 GMT

Without thinking I turned off my R5 Mark II after the installment of the latest firmware upgrade had started. I turned it back on right away. I could not stop the installation once it started and let it finish. I really want to reinstall the upgrade again, but don't know how to do this. Everything seems to work OK, but I think it is wise to reinstall the update.

Is it possible to reinstall the upgrade.

Re: "Reinstalling" latest R5 firmware upgrade

AtticusLake — Fri, 01 Aug 2025 09:41:26 GMT

I don't have the R5II, but I have used several similar cameras, and I have spent years in tech product development, so maybe I can give you some general hints.

First up, you say "Everything seems to work OK". This is good!

The firmware is generally a monolithic block of software. You can't realistically be running bits of one version and bits of another version. So, if the camera is working, you're either still on the old version, or you're on the new version. (This does rather depend on how Canon actually manage updates internally, which I don't know because I don't work for Canon, but it should be a safe bet.)

So, go into your camera's menus, find the "firmware" section (the "wrench" section, last tab), and look at the firmware version you are currently running.

If it's the old version, then you need to try the update again. (Don't turn it off this time!).
If it's the new version - I think that would be 1.1.1 as of now - then it's fine, the update completed, you're done. IOW don't go looking for problems if it's all working.

I don't know if you can re-apply the update if you're currently running the same version - I don't think you can, and in any case it can't really help anything.

Hope this helps.

Re: "Reinstalling" latest R5 firmware upgrade

FloridaDrafter — Sat, 02 Aug 2025 17:22:12 GMT

@tomshield wrote:

Without thinking I turned off my R5 Mark II after the installment of the latest firmware upgrade had started. I turned it back on right away. I could not stop the installation once it started and let it finish. I really want to reinstall the upgrade again, but don't know how to do this. Everything seems to work OK, but I think it is wise to reinstall the update.

Is it possible to reinstall the upgrade.

If I am understanding, once you turned the camera back on it finished the f/w update?

Did the camera prompt you for a password/PIN after the f/w install?

Newton

Re: "Reinstalling" latest R5 firmware upgrade

tomshield — Sat, 02 Aug 2025 18:28:56 GMT

It asked for a password and seems to be working as expected. I am confident it was updated in spite of my mistake. Thanks for responding!