To Owners of the EOS-1D Mark III and EOS-1Ds Mark III Digital SLR Cameras

Name of Sales Company

Thank you for using Canon products.

We have discovered that abnormal mirror operation occurs in some EOS-1D Mark III and EOS-1Ds Mark III digital SLR cameras. Accordingly, we would like to provide information about the details of this issue and how it can be resolved.


We offer our sincerest apologies to customers using these products who have been inconvenienced by this issue. Canon always strives to provide the highest quality products to our customers, and we spare no effort in our quality management to make sure our customers can use our products with confidence. We hope our efforts will earn your understanding.


The mirror does not operate even if the shutter button is pressed, and the following message,

Err 99 Shooting is not possible. Turn the power switch to <OFF> and <ON> again or re-install the battery,

appears frequently on the camera’s LCD monitor.

Affected Products  

EOS-1D Mark III and EOS-1Ds Mark III digital SLR cameras


Free repairs will be provided to affected products. Please click here to complete a registration form if you own an affected product and wish to arrange for service. After you have submitted the form you will be contacted by a representative of a Canon Service Centre within one week for an appointment.

When you have made an appointment we can ensure that your product(s) are serviced within a short time frame.


Firmware Update


Firmware that further specifies error indications based on the details of detected errors is now available.  The error indications are specified based on the causes of errors so that adequate support can be provided to customers.


For details about the specified error indications and procedures to download the firmware, please go to the following Web sites.

●EOS-1D Mark III Firmware Update Version 1.2.5

●EOS-1Ds Mark III Firmware Update Version 1.1.4