Problem with 5D Mark III RAW files ...

Started Sep 1, 2012 | Discussions thread
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mike cooper Regular Member • Posts: 190
Problem with 5D Mark III RAW files ...

I was shooting a wedding a couple of weeks ago and using my 5D Mark III for the first time (in a major shoot). I had also rented a 5D Mark III from LensRental. I was careful to label the photos so I am 99% sure that the photos came from my camera and not the rental. These photos represent only 10 frames out of about 1,200 I took with both cameras - my guess is I took about 800 with my camera and 400 with rental.

Has anyone seen this happen?


  • Dual card recording - separately

  • Slot 1 (CF); Lexar 8GB Platinum II (200x); Recording High RES JPEGS (Smooth profile)

  • Slot 2 (SD); SanDisk 32 GB Extreme Pro SDHC; Recording CR2 RAW files

All 10 of the bad images have the same basic pattern (at least the landscape ones). Picture in upper left of frame is good and then it looks like someone melted the negative! The JPG images were perfect. Also, it looks like these were the last images I wrote to this card. It is also the first time both of these cards have been used. I did a fresh format (in the camera) before the shoot and the SD card had the low level format turned on. I purposely put the RAW format on the SD card as it had a larger capacity and I read that the camera sort of defaults to the speed of the SD card (which is slower than the ExtremePro can handle).

As an aside - after this shoot I had considered recording only RAW as the time to process, buffer fill, etc. takes so long - not to mention keepiing JPG and RAW files in sync between two cameras - is huge. But after seing these I will always record in both HiRes JPG and RAW!

Anyone seen this or reported it to Canon? Could it be a bad card? Sort of ruled this out as all bad RAW files had the same look and feel. If it was a bad card I would think the image would not be readable or the images would show random patterns. Although this was the first time I recorded a large amount of RAW I have been shooting RAW images since my 10D days and had a 5D Mark II for 2 years and never saw this.


Canon EOS 10D Canon EOS 5D Mark II Canon EOS 5D Mark III
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