Canon EOS-1DX MARK II Settings Manual page 92

Group I
AF is possible with 13 points
AF is possible with the center point
AF focusing is possible with 13 points. The following AF
area selection modes are available: Single-point Spot AF,
Single-point AF, Shooting with AF point expansion (up,
down, left, and right), Zone AF (manual selection of
zone), and Auto selection of 13 AF points.
Major lens + extenders—
Group I
EF300mm F4L IS USM+ Ext EF2x III
EF300mm F4L USM+ Ex EF2x III
EF70-200mm F4L IS USM+ Ext EF2x III
EF70-200mm F4L USM+ Ext EF2x III
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