To Users of the EF50mm f/1.4 USM Interchangeable Lens for Digital SLR Cameras and Mirrorless Cameras
Thank you for using Canon products.
We have determined that some EF50mm f/1.4 USM lenses exhibit a focus operation-related malfunction. The details of the phenomenon and Canon's service policy are described below.
We would like to offer our sincere apologies to users who have been inconvenienced by this issue. Going forward, we will spare no effort in our quality management to make sure our customers can use our products with confidence.
While in AF or MF mode, when the focus position is moved from the infinity end to the close-up end, the focus operation stops near the area shown in the dotted circle below.
Possibly Affected Products
If the first four digits (from the left) in the serial number on the lens body (see image below) are "4918", "5018", "5118", "5218", "5318", "5418", "5119", "5219", "5319", or "5419" then your lens may possibly be affected.
If your lens is affected, support will be provided free-of-charge regardless of the warranty status. Please note that even if your lens is affected, inspection/repairs for any issue other than the above phenomenon will be handled as normal repairs.
If you wish to make a request for support for this issue, please attach the lens cap and dust cap to the lens and bring in/send us the lens body only.