Canon EOS-1D C EOS 1D X Instruction Manual - Page 73

AF Area Selection Modes AF point expansion (Manual selection, surrounding points) The manually-selected AF point and adjacent AF points are used to focus. The AF point expansion is larger than with AF point expansion (Manual selection ), so the focusing is executed over a wider area. Effective when it is difficult to track a moving subject with just one AF point. AI Servo AF and One-Shot AF work in the same way as with AF point expansion (Manual selection ) mode (p.72). Zone AF (Manual selection of zone) The 61 AF points are divided into nine zones for focusing. All the AF points in the selected zone are used to automatically select the point of focus. It makes achieving focus easier than with Single-point AF or AF point expansion and it is effective for moving subjects. However, since it is inclined to focus the nearest subject, focusing a specific target is harder than with Single-point AF or AF point expansion. The AF point(s) achieving focus is displayed as . 73