To Customers Who Use the EF 70-300 f/4-5.6 IS USM Lens:
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 represents for customers who use this lens and appreciate your understanding and cooperation.