Canon UK has issued a notice to Canon users regarding AF operation with certain camera-lens combinations. Specifically, those using the Canon EOS 7D, 40D, 50D or 60D camera with one of the lenses below may find that the peripheral AF points work as line sensors rather than cross sensors, and are therefore sensitive to vertical OR horizontal detail only, but not both at the same time. Normally, if you use any EF or EF-S lens with a maximum aperture of f/5.6 or faster, all AF points on these cameras should work as cross-type AF points, but this does not apply to the lenses listed below. These are quite old lenses - all of them were released between 1990 and 1995.

The affected lenses include:

EF 35-80mm f/4-5.6
EF 35-80mm f/4-5.6 II
EF 35-80mm f/4-5.6 III
EF 35-80mm f/4-5.6 USM
EF 35-105mm f/4-5.6
EF 35-105mm f/4-5.6 USM
EF 80-200mm f/4.5-5.6 II
EF 80-200mm f/4.5-5.6 USM

Source: Canon UK

Your Comments