AF Modes: Differences between One-Shot AF, AI Servo AF, and AI Focus AF (EOS-1D X)
18-Jun-2012
8201498100
Solution
This camera has two types of AF modes that can be selected to accommodate different shooting conditions and subjects.
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 achieved focus will flash briefly in red, and the focus confirmation light [
] in the viewfinder will also light. - 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. For further information, please refer to the Related information section "Shooting with Focus Lock (EOS-1D X)".
NOTE
- If focus cannot be achieved, the focus confirmation light [ ] in the viewfinder will blink. If this occurs, a picture cannot be taken even if the shutter button is pressed completely. Recompose the picture and try to focus again. Or refer to the Related information "Difficult subjects for AF (Auto Focus)".
- If [
: Beep] is set to [Disable], the beeper will not sound when focus is achieved.
This AF mode is for moving subjects when the focusing distance keeps changing. While you hold down the shutter button halfway, the subject will be focused continuously.
- The exposure is set at the moment the picture is taken.
- When the AF area selection mode is set to 61-point automatic selection, the camera first uses the manually-selected AF point to focus. During autofocusing, if the subject moves away from the manually-selected AF point, focus tracking continues as long as the subject is covered by the Area AF frame.
NOTE
With [AI Servo AF], the beeper will not sound even when focus is achieved. Also, the focus confirmation light [ ] in the viewfinder will not light.
] in the viewfinder will not light.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 the One-Shot AF mode, the icon also appears after focus is achieved when you press the shutter button halfway.
NOTE
The AF status indicator can be displayed outside the viewfinder's image area.
1. Set the lens focus mode switch to <AF>.
2. Press the <AF･DRIVE> button.
3. While looking at the LCD panel, turn the <Main Dial> to select the AF mode.
