Canon AT 1 Spezifikationen PDF herunterladen (Seite 33)

Selecting the AF Mode

● AI Servo AF

Use this mode when taking pictures of

moving subjects. The lens focuses the

subject continuously while the shutter

button is pressed halfway. AI Servo’s

predictive focus control* can track sub-

jects moving toward or away from the

camera. Exposure is determined

immediately before the shutter is

released.

In AI Servo AF mode, this function lets

you select the focusing point with the

quick control dial to manually track the

moving subject.

* Predictive focus control

Predictive focus continuously measures the distance and speed of a sub-

ject that is moving at a relatively constant velocity, and then predicts the

subject position so that the subject will be sharply focused at the instant of

exposure.

When using a manually selected focusing point, it is used for predictive

focusing and lights red in the viewfinder.

In automatic focusing point selection mode, cover the subject with the

center focusing point for initial focusing. After that, even if the subject

moves to a different focusing point, the camera’s predictive focus function

will continue to track the subject as long as it is covered by one of the

focusing points. The focusing point does not light up.

AI SERVO

3 2 1 1 2 3

• In AI Servo AF mode, the viewfinder’s in-focus indicator does not light up and the beep-

er does not beep even when the subject is in focus.

• The in-focus indicator blinks if the subject cannot be focused.

• Focus lock cannot be used in this mode, but autofocus can be temporarily suspended

through Custom Function 4-2 (refer to pages 86–87).

Custom Function

(Refer to pages 90–91)

Custom Function

(Refer to pages 86–87)

In AI Servo AF mode with predictive

focusing (used for sports photography,

etc.), this function lets you momentarily

lock the focus using the AE lock button.

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