AF Modes (Differences between One-Shot AF/AI Servo AF/AI Focus AF) (EOS 80D)
25-Jan-2016
8202789200
Solution
You can select the AF operation that best matches the shooting conditions and subject.
1. Set the lens's focus mode switch to <AF>.
2. Set the camera's power switch to <ON>.
3. Set to a Creative Zone mode.
4. Press the <AF> button.
5. While looking at the LCD panel, turn the <
> or <
> dial to select the AF operation.
> or <> dial to select the AF operation.- ONE SHOT : One-Shot AF
- AI FOCUS : AI Focus AF
- AI SERVO : AI Servo AF
NOTE
In Creative Zone modes, you can also press the <AF-ON> button to autofocus.
Suited for still subjects. When you press the shutter button halfway, the camera will focus only once.
- When focus is achieved, the AF point that achieved focus will be displayed, and the focus indicator <
> in the viewfinder will also light 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 the shooting menu [
: 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 45-point 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.AI Focus AF switches the AF operation from One-Shot AF to AI Servo AF automatically if a still subject starts moving.
After the subject is focused in One-Shot AF, if the subject starts moving, the camera will detect the movement, change the AF operation automatically to AI Servo AF, and start tracking the moving subject.
NOTE
When focus is achieved with AI Focus AF with the Servo operation active, the beeper will continue beeping softly. However, the focus indicator <> in the viewfinder will not light up. Note that focus will not be locked in this case.
> in the viewfinder will not light up. Note that focus will not be locked in this case.