EOS-1D X Mark II AF Modes (Differences between One-Shot AF/AI Servo AF)
08-Feb-2016
8202817800
Solution
This camera has two kinds of AF mode, allowing you to select the AF operation that best matches the shooting conditions and subject.
Suited for still subjects. When you press the shutter button halfway, the camera will focus only once.
- When focus is achieved, the AF point which achieves focus flashes in red and the focus indicator [
] in the viewfinder lights up. - With evaluative metering, the exposure setting will be set at the same time focus is achieved.
- While you hold down the shutter button halfway, the focus will be locked. You can then recompose the shot if desired.
NOTE
- If focus cannot be achieved, the focus indicator [ ] in the viewfinder will blink. If this occurs, the picture cannot be taken even if the shutter button is pressed completely. Recompose the shot or use one of the following methods and try to focus again.
- Focus on an object at the same distance as the subject and lock the focus, then recompose the shot. (Focus lock)
- Set the lens's focus mode switch to <MF> and focus by turning the lens's focusing ring until the subject looks sharp in the viewfinder. In this case, if you press the shutter button halfway during manual focusing, the AF point that achieved focus and the focus indicator [ ] will light up in the viewfinder.
] will light up in the viewfinder.- If [
Beep ] is set to [Disable], the beeper will not sound when focus is achieved. - After achieving focus with One-Shot AF, you can lock the focus on a subject and recompose the shot. This is called "focus lock".This is useful when you want to focus on a peripheral subject not covered by the Area AF frame.
- When a lens equipped with electronic manual focusing function is used, after achieving focus, you can focus manually by turning the lens focusing ring while pressing the shutter button halfway.
This AF operation is suited for moving subjects when the focusing distance keeps changing. While you hold down the shutter button halfway, the camera will keep focusing on the subject continuously.
- The exposure is set at the moment the picture is taken.
- When the AF area selection mode is set to Automatic selection AF, focus tracking will continue as long as the Area AF frame covers the subject.
NOTE
With AI Servo AF, the beeper will not sound even when focus is achieved. Also, the focus indicator [ ] in the viewfinder will not light up.
] in the viewfinder will not light up.When you press the shutter button halfway and the camera is focusing with AF, the [ 
] icon will appear on the lower right of the viewfinder.
] icon will appear on the lower right of the viewfinder.In One-Shot AF mode, the icon also appears if you press the shutter button halfway after focus is achieved.
NOTE
The AF operation indicator can be displayed outside the viewfinder's image area.
1. Set the lens's focus mode switch to <AF>.
2. Press the <AF･DRIVE> button.
3. While looking at the top LCD panel or in the viewfinder, turn the < 
> dial to select the AF mode.
> dial to select the AF mode.