topic Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent in EOS DSLR & Mirrorless Cameras

EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Sat, 27 Jun 2026 15:47:13 GMT

I have my 5D3 set to record to separate cards. I have #1 CF card set to sRAW & #2 SD set to RAW. I have Record Function set to Record separately, Playback set to card 2. I shot a wedding yesterday and imported both cards to a separate folder thru Adobe Bridge. During processing I noticed differences in dimensions in the same folder. The folder I imported from the CF card had both 5760x3840 & 2880x1920 images. Same thing for the folder with the images from the SD card. I haven't noticed this before & the only thing different I used was a Canon 24-105 F4L lens that I just got which shouldn't matter. I can put all the images in one folder and sort by dimensions and then move each size to another separate folder, which is a pain. Any suggestions on something to look for. Firmware version is 1.3.6. Thank you in advance.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

jrhoffman75 — Sat, 27 Jun 2026 17:37:11 GMT

Did you follow there's steps?

https://support.usa.canon.com/kb/s/article/ART133785

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Sat, 27 Jun 2026 18:27:29 GMT

Thank you, but I know how to record to separate cards. The problem is that it would randomly put both RAW & sRAW on both the CF & SD cards. For instance on the CF card it would have several at the RAW size and then a few at the sRAW size. It would be just the opposite on the SD card. As an example the CF would have image 001 at RAW and image 002 at sRAW. The SD card would have image 001 at sRAW and image 002 at the RAW size. Hope this helps explain it a little better.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

Waddizzle — Sun, 28 Jun 2026 14:03:08 GMT

I am betting / guessing that you use a card reader to download your files.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Sun, 28 Jun 2026 14:31:30 GMT

Yes, my PC has dedicated CF & SD slots. I use the Photo Downloader in Adobe Bridge (CS6) to import. I first imported from the SD card which "should've" only had the RAW sizes, but it had both RAW & sRAW files.

I started over and imported the SD card to a new folder & then the CF card to a separate new folder. Each contained both RAW & sRAW files. I ended up putting all the files in one folder, sorting by dimensions, and then moving all the sRAW files to another folder. It was a pure pain in the butt.

I don't know if some setting got changed (see OP for how I have the recording set) or what happened as it never happened before that I've noticed. Seems to be a head scratcher.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

shadowsports — Sun, 28 Jun 2026 14:52:39 GMT

Are you swapping cards during shooting and closing the memory card door with the camera powered on?

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Sun, 28 Jun 2026 15:09:50 GMT

No. Both cards were formatted the morning of and the memory card door not opened until got home to import. Did not change lenses, only used the Canon 24-105 f4L & Canon 580 EXII.

For giggles I decided to look at the SD card on another PC (did not import, only looked at file explorer). Here is how the images recorded.

sRAW - 6948-6958, 6982-6988, 6995-7003, 7006-7021, 7090-7304.

RAW - 6959-6981, 6989-6994, 7004-7005, 7022-7089, 7305-7343.

No rhyme or reason that I can see.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

jrhoffman75 — Sun, 28 Jun 2026 16:28:45 GMT

That was my thought.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

jrhoffman75 — Sun, 28 Jun 2026 17:02:22 GMT

Strange. It’s not the first time someone has posted about this. I have never seen an explanation. I’ve had dual card cameras since 2005 and never personally experienced it.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Sun, 28 Jun 2026 17:28:34 GMT

I got the 5D3 used a couple of years ago and mainly have shot my grandson's football games since. Stopped doing weddings/etc 6-7 years ago. Got talked into this one since it was a relative of my wife.

I think I'll just chalk it up to "cosmic coincidence". 😃

Thanks for all the replies trying to help!

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

ebiggs1 — Mon, 29 Jun 2026 14:55:55 GMT

I don't have a real answer either since I haven't experienced it either. I use dual card slot cameras for years upon years. So my stock answer and remedy is a full reset of the 5D Mk III (a fantastic camera). I usually don't suggest a FW update on a malfunctioning but in this case I would try it. You may not be able to if you have the latest FW. And of course the obligatory question, you are using top quality CF and SD cards? And, big 'and', bought from a known good retail outlet. That's not Amazon or eBay or FB Marketplace. These are the simple things that probably won't make any difference but there is a chance and they are easy.

Do the full reset any way!

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Mon, 29 Jun 2026 17:39:37 GMT

Firmware is 1.3.6. CF is a SanDisk Extreme Pro, SD is SanDisk Ultra Plus. Purchased from Adorama in 2023, I don't remember the exact shutter count, but seems like it was around 35,000 or so. It looked brand new.

I may try the full reset, may wait and see if it does it again. I assume you mean "Clear all camera settings" in the menu. I don't typically do weddings any more, got talked into this one because a relative of my wife. Mostly shooting the grandson's high school/college football games. Yeah, love the 5D3, it replaced my 5D as main. Thanks again for the help.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

Waddizzle — Mon, 29 Jun 2026 19:02:59 GMT

“ I have my 5D3 set to record to separate cards. I have #1 CF card set to sRAW & #2 SD set to RAW. I have Record Function set to Record separately, Playback set to card 2. “

” I don't know if some setting got changed (see OP for how I have the recording set) or what happened as it never happened before that I've noticed. Seems to be a head scratcher. “

I think I have solved your mystery. The image sizes are normal. The s-RAW format is a smaller file size with less resolution.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Mon, 29 Jun 2026 19:15:11 GMT

"I think I have solved your mystery. The image sizes are normal. The s-RAW format is a smaller file size with less resolution."

Correct, the file size & dimensions are different. The problem remains that RAW & sRAW files shouldn't be on the same card.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

Waddizzle — Mon, 29 Jun 2026 19:41:06 GMT

What you’re seeing is normal. I posted the specs, but somehow the post is on page 1.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Mon, 29 Jun 2026 20:00:46 GMT

Are you saying it is normal to have a mixture of RAW & sRAW on each card? I would think that each card would only have the way it is set up, for instance CF - only RAW, SD - only s-RAW.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

Waddizzle — Mon, 29 Jun 2026 21:15:36 GMT

“ I have my 5D3 set to record to separate cards. I have #1 CF card set to sRAW & #2 SD set to RAW. “

“ Are you saying it is normal to have a mixture of RAW & sRAW on each card?

During processing I noticed differences in dimensions in the same folder. The folder I imported from the CF card had both 5760x3840 & 2880x1920 images. Same thing for the folder with the images from the SD card. “

Where did you get that idea? I am only trying to tell you that the reduced image resolution for sRAW is normal.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

Waddizzle — Mon, 29 Jun 2026 21:19:18 GMT

I suggest that you reset your camera.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

DWT54 — Mon, 29 Jun 2026 23:01:41 GMT

Well I happened to stumble on the reason by accident. The C1, C2, & C3 settings all showed the CF set to sRAW and the SD card set to RAW. When set to M the CF is set to RAW & the SD is set to sRAW. Checked and if using Av, Tv, or P the CF is set to RAW and the SD to sRAW. I switched a few times between shooting Manual and using C1, C2, or C3. I went back at the images and looked and the exif and it matches the changes.

At some point back in time I had the CF set to sRAW and registered C1. After that I'm guessing I used it as a base for C2 and C3. After I switched the CF to RAW and the SD to sRAW the C1, C2, C3 kept the original settings of the way I had the cards to shoot.

Re: EOS 5D Mark III sRAW and RAW image dimensions are inconsistent

jrhoffman75 — Mon, 29 Jun 2026 23:28:37 GMT

Thank you for posting the resolution.