A través de la web estadounidense ha publicado el siguiente comunicado

To Customers Who Use the EF 70-300 f/4-5.6 IS USM Telephoto Zoom Lens:

Thank you very much for your patronage of our products.

We have recently become aware 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 have been studying the symptoms of this phenomenon in order to determine its precise cause and to develop an appropriate remedy. We will inform you on this Web site as soon as this remedy has been decided, which, at this point should be by the end of June 2006.

We are very sorry for the inconvenience this phenomenon represents for customers who use this lens and appreciate your patience as we work to resolve it.

Contact Information for inquiries

Call Center
1-800-828-4040 (toll free)
8AM to Midnight – Monday to Friday
10AM to 8PM – Saturdays
Email: carecenter@cits.canon.com

Como sabréis este objetivo responde muy bien en horizontal, pero su calidad cae en picado en el formato vertical. Supongo que Canon España deberá de anunciar algo parecido

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