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Service Notice: EOS-1D Mark III/EOS-1Ds Mark III: Abnormal Mirror Operation (Err 99)


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 appears frequently on the camera’s LCD monitor.

‘Err 99 Shooting is not possible. Turn the power switch to and again or re-install the



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


Free repairs will be provided to affected products. Please contact our Customer Support

Center if you own an affected product and wish to arrange for service.

This information is for residents of the United States and Puerto Rico only. If you do

not reside in the USA or Puerto Rico, please contact the Canon Customer Support Center

in your region.

Contact Information for Inquiries
Canon U.S.A., Inc.
Customer Support Center
Phone:      1-800-OK-CANON (toll free)

Email: carecenter@cits.canon.com
Support options and hours of operation: www.usa.canon.com/support

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