Cuplikannya :

Canon USA has today posted a service notice relating to the new EF 24-105 mm F4L IS USM lens. The notice describes a problem which affects some early production samples of this lens where 'unacceptable levels of flare' can occur, mostly at wide angle and maximum aperture. Those lenses with a control number (a serial number beginning with UT) of 1000 or less are affected. The notice goes on to offer a free repair service (including shipping) which will commence on November 14th. We haven't seen any other such notices from any other regions.

Canon to repair some 24-105 mm F4L lenses