Scott Thomas

This is my response from Canon about the above issue. "[i]Thank you for contacting Canon product support. We value you as a Canon customer and appreciate the opportunity to assist you. I am sorry to hear that your EOS 5D Mark III cameras are locking up intermittently.We are not aware that there is an issue with these Sandisk cards within the camera. If you suspect it to be the cards, I would recommend trying a different brand and or size to see if the issues persist. We are not aware in advance when new firmware and or changes are coming to the camera. Anything like this would be announced on the Canon EOS web site. I would say that if another card causes the same issue you would want to send the camera in for service. Currently we are not able to recommend one specific brand of cards over another. We apologize for any inconvenience that this may cause you at this time.I hope this information is helpful to you. Please let us know if we can be of any further assistance with your EOS 5D Mark III.Thank you for choosing Canon.Sincerely,[/i][i]TimothyTechnical Support Representative"[/i]

Apparently I've heard on another forum that this problem is related to using sandisk extreme 32gb 60Mb cards. I'm Using sandisk extreme pro 90Mbs. Has anyone else have problems with this combination?

Both my 5d Mk3's are locking up intermittently. So far I've lost two wedding ceremonies from these cameras. I'm using genuine Sandisk extreme pro 32gb cards. I'm trying now to induce the problem at home to see if I can work out what is going on. So far it seems to me that the camera may be trying to write a file larger than fat32 will allow. Times the cameras have locked up have been around the moment the camera is about to split the file and start a new file to reach the 29 min mark. When the problem happens the footage starts to skip on the display for about 3 seconds then freezes. Only taking the battery out will unfreeze the camera. The footage of the previous 12 mins is lost completely. Does any one know of a forum dealing with this problem I can join? Canon really need to do something about this ASAP. The camera is useless for events until you can trust it will not loose your footage! Is anyone else experiencing these problems?