Thank you very much for your patronage of our products.

We recently informed you of a phenomenon in which some images captured by the EF 70-300 f/4-5.6 IS USM lens appear in insufficient resolution. This phenomenon may be seen at the edge of the frame at the 300mm setting when the camera is held vertically.

We are very sorry for the inconvenience that this phenomenon has caused for customers who use this lens and appreciate your understanding and cooperation. We have now determined the cause and have developed the remedy.

Affected Products:
This phenomenon affects all EF 70-300 f/4-5.6 IS USM lenses with a "0" or "1" in the third digit of the (8 digit) serial number. Products that have a third digit of "2" or higher in their serial number are not affected.

Serial numbers shown within the blue dotted frame in the figure above: XX0XXXXX or XX1XXXXX.

Customer Support:
From 18th July we will start making inspections and repairs free of charge for customers who are experiencing this phenomenon.
If you have any other questions, please contact our Helpdesk. Please clickhereto find the telephone number.