topic R6MII Filename Problem in EOS DSLR & Mirrorless Cameras

R6MII Filename Problem

stcapp1426 — Sun, 16 Jun 2024 16:57:50 GMT

I have an R6MII, and I changed the filename on the camera to begin with R6M2. It's been this way since I bought the camera in November. I just updated the firmware, and now the camera is naming the files beginning with _6M2 (with a leading underscore) instead of R6M2. The camera menu settings still show it set to R6M2.

What on earth is going on?

Re: R6MII Filename Problem

shadowsports — Sun, 16 Jun 2024 17:43:50 GMT

Greetings,

You cannot use an "_" underscore at the beginning of a file name:

Canon : Product Manual : EOS R6 Mark II : File Naming (start.canon)

An underscore (“_”) cannot be used as the first character.

You need to do 2 things.

One, perform a full settings reset, both Main and Custom settings, and two, format (in camera) any memory cards you are using with the camera currently.

Re: R6MII Filename Problem

stcapp1426 — Sun, 16 Jun 2024 17:46:17 GMT

I didn't put the underscore there, it just showed up after the firmware update. My camera settings still show R6M2. I also just formatted the card. I only have 1 card in there.

Re: R6MII Filename Problem

shadowsports — Sun, 16 Jun 2024 18:22:33 GMT

Greetings,

I understand. After the full reset and card format, are images being saved using the default file naming convention?

Re: R6MII Filename Problem

stcapp1426 — Sun, 16 Jun 2024 18:32:50 GMT

Yes. And I changed it back to my user setting of R6M2 and it's correct now. I wonder what happened?

I guess I now have to go through all the settings and set them up the way I had them before...

Thank you!

Re: R6MII Filename Problem

shadowsports — Sun, 16 Jun 2024 19:46:32 GMT

Greetings,

Hard to say. The camera shouldn't allow a naming convention starting with the underscore. Somehow a combination of settings, possibly with the card not being formatted coupled with the firmware upgrade caused the error. Another possibility might be related to moving the cards between different slots without formatting or after creating folders or deleting files. Any one of these things or a combination caused the issue.

You should never be concerned about going back in and reconfiguring the camera. This occasional exercise will build greater familiarity with your camera. 😀

Re: R6MII Filename Problem

stcapp1426 — Sun, 16 Jun 2024 19:54:17 GMT

Thank you. I've done that now and have set everything up the way I had it before. Interestingly, I format the card every time I remove photos from it; something a friend said was drilled into her, so I do it. I formatted it prior to doing the firmware update. Who knows? It's technology, and I truly appreciate you helping me solve this problem. I still have a lot to learn about this powerful camera!!!

Re: R6MII Filename Problem

FloridaDrafter — Sun, 16 Jun 2024 21:38:33 GMT

More than likely, your color space got changed either by accident or during the f/w update.

If you use the Adobe RGB color space, the camera will auto rename your files to add the "_". See page 249 of your Advanced Users Guide. I believe sRGB is default, so the reset put you back in that color space, which doesn't have the leading underscore.

Newton

Re: R6MII Filename Problem

stcapp1426 — Sun, 16 Jun 2024 23:45:17 GMT

Wow thank you! I don't know what it did, but I just checked it after the reset and it's sRGB . So we'll see. Thank you again!

Re: R6MII Filename Problem

shadowsports — Mon, 17 Jun 2024 01:57:27 GMT

Thanks Newton. You just reminded.me of this. We had a discussion about it a couple of weeks ago. 🙂

Re: R6MII Filename Problem

duceduc — Sat, 10 Jan 2026 03:30:20 GMT

Thx for the tip. Something changed the color space to Adobe RGB and it was not from the firmware update. Hope this gets fix since not all will know about Adobe RGB colorspace will overwrite the filename with a leading '_' . A factory reset is not cool. I don't want to have to go through all my settings to change it the way I had it. Why was the feature to backup your settings to the card left out on the R6 since the R5 has it?