Canon EF 50mm f/1.4 USM service advisory

ef 50mm

Canon issued a service advisory for the EF 50mm f/1.4 USM lens.

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.

ef 50mm

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”, or “5418” then your lens may possibly be affected.

ef 50mm


Potentially affected products will be inspected and if necessary repaired free of charge.  If you own one of the potentially affected products please contact our Customer Support Center. 

When preparing your lens for inspection please be sure to attach the lens cap and the dust cap to the lens.

If you have not already done so, please register your Canon Product. By registering, we will be able to notify you via email about future announcements.

This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region. 

Thank you,
Customer Support Operations
Canon U.S.A., Inc

Contact Information for Inquiries
Canon Customer Support Center
Phone: 1-800-OK-CANON
TDD: 1-866-251-3752
Support options and hours of operation:


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Rokinon 50mm f/1.2 Manual Focus Lens for Canon EOS M

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A new Canon EF 50mm f/1.4 with nano USM coming? [CW2]

canon rumorscanon rumors

This is a long running rumor and every since and then it surfaces over the web. It’s suggested Canon will soon release a new EF 50mm f/1.4 lens with nanoUSM motor.

While it is true that the EF 50mm f/1.4 USM  is 25 years old and long overdue, this rumor has little to get you excited. It’s just running since too long and all too often jumps out of the blue.

Here too we heard about this lens. We do not believe you’ll see a new EF 50mm f/1.4 in 2017. Do not expect it before 2018.