Canon 2011B002, EOS-1 DS C.Fn III -9Selectable AF point, C.Fn III -8AF expansion with selected point

3Custom Function Settings

C.Fn III -8 AF expansion with selected point

In the AI Servo AF or One-Shot AF mode with manual AF point selection, you can increase the number of AF points by using the Assist AF points. Effective when it is difficult to track a moving subject with just one AF point.

0:Disable

1:Enable (left/right Assist AF points)

The points on the immediate left and right (or top and bottom for a vertical shot) of the user-selected AF point become active.

2: Enable (surrounding Assist AF points)

The points immediately surrounding the user-selected AF point become active.

The AF point expansion centers on the selected AF point. Therefore, if a peripheral AF point is selected, the AF point expansion will be smaller as shown below.

Assist AF point expanded by 1 point on left and right Assist AF point expanded by 1 point all around

Selected AF point Expansion points

Even when C.Fn III -9-1/2 is set, the expansion will take effect.

C.Fn III -9 Selectable AF point

0:19 points

1:Inner 9 points

The user-selectable AF points will be limited to the inner 9 points.

2: Outer 9 points

The user-selectable AF points will be limited to the outer 9 points.

With settings 1 and 2, the selectable AF points and the selection pattern will be as shown below:

	Inner 9 points		Outer 9 points
Automatic selection	Automatic selection	Automatic selection	Automatic selection

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