To Users of the EF300mm f/2.8L IS II USM and EF400mm f/2.8L IS II USM Interchangeable Lenses for Digital SLR Cameras (the "Lenses")
Thank you for using Canon products.
In regards to the above mentioned products, we would like to notify customers that the lens hood may rotate when a certain amount of pressure is applied even when the lock screw for the lens hood on the Lenses is fastened. However, the hood will not be detached from the lens. As a result, some specifications for the lens hood have been changed to address this phenomenon.
Lens hoods for EF300mm f/2.8L IS II USM and EF400mm f/2.8L IS II USM interchangeable lenses for Digital SLR Cameras.
- Serial number: 770xxxxxxx through 841xxxxxxx
For customers who may be inconvenienced by this phenomenon during shooting and would like to request a lens hood exchange, please contact your nearest Canon Customer Service center.