Canon EOS 10D User Manual download pdf (Page 66)

Selecting AF Mode

AI Servo AF for Moving Subjects

While you press the shutter button

halfway, the camera focuses continu-

ously.

•

This AF mode suits moving subjects when the

focusing distance keeps changing.

•

With predictive AF

∗

, the camera can also focus

track a subject which steadily approaches or

retreats from the camera.

•

The exposure settings are set immediately before

the image is captured.

•

When focus is achieved, the focus confirmation light <

●

> in the viewfinder will not

light and the beeper will not sound.

•

If the focus confirmation light <

●

> in the viewfinder blinks, it means focus has not

been achieved.

•

Focus lock cannot be used.

∗ Predictive AF

If the subject approaches or retreats from the camera at a constant rate, the camera tracks the

subject and predicts the focusing distance immediately before the image is captured. This is

for obtaining correct focus at the moment of exposure.

•

When the AF point selection is automatic, the camera first uses the center AF point to focus.

If the subject moves away from the center AF point, focus tracking continues as long as the

subject is covered by another AF point. The active AF point will not flash in red.

•

With a manually selected AF point, the selected AF point is used for predictive AF.

With C.Fn-04-2, holding down the < > button will temporarily stop the AF operation in

the AI Servo AF mode. (→p.146)

AI Focus AF for Automatic AF Mode Switching

The AI Focus AF mode switches automatically from

One-Shot AF to AI Servo AF if the subject starts to

move.

If focus is achieved in the One Shot AF mode and the

subject starts to move continuously, the camera will

detect the movement and switch automatically to AI

Servo AF to focus track the subject.

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Canon EOS 10D User Manual Page 66

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