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Lenses and Usable AF Points
If the maximum aperture value is slower than f/5.6 (greater than f/5.6 but not
o
exceeding f/8), focus may not be achieved with AF when shooting low-contrast
or low-light subjects.
If the maximum aperture value is slower than f/8 (greater than f/8), AF is not
o
possible during viewfi nder shooting.
For updates on "Group Classifi cation of Lenses," visit the Canon website or
o
others.
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