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AF Area Selection ModesK
Maximum Lens Aperture: f/3.2 - f/5.6
With all AF points, cross-type AF sensitive to both vertical and
horizontal lines is possible. However, with the lenses below, the
peripheral AF points will detect only vertical or horizontal lines (no
cross-type focusing).
Maximum Lens Aperture: f/1.0 - f/2.8
Besides cross-type focusing (vertical and horizontal lines detected
simultaneously), the center AF point can also perform high-precision,
vertical-line sensitive AF.*
The remaining 18 AF points perform cross-type focusing, as with the
maximum aperture at f/3.2 - f/5.6.
* Except with the EF28-80mm f/2.8-4L USM and EF50mm f/2.5 Compact Macro.
AF Operation and Maximum Lens Apertures
Lenses that Do Not Support Cross-Type Focusing with
Peripheral AF Points
Cross-type focusing at the < > and < > AF points is not possible with the
following lenses:
EF35-80mm f/4-5.6, EF35-80mm f/4-5.6 II, EF35-80mm f/4-5.6 III,
EF35-80mm f/4-5.6 USM, EF35-105mm f/4.5-5.6, EF35-105mm f/4.5-5.6
USM, EF80-200mm f/4.5-5.6 II, EF80-200mm f/4.5-5.6 USM
Cross-type focusing
Vertical line-sensitive focusing
Horizontal line-sensitive focusing