Canon C12-8453, Service Manual

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(2) AF
The AF features are as follows:
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7-point AF
The EOS ELAN 7 E / EOS 30 has the CMOS sensor (for 7
focusing points) that was developed for the EOS 300/Rebel
2000/EOS REBEL 2000 / EOS 300 (hereinafter referred to as
the EOS REBEL 2000 / EOS 300). The seven focusing points
are clearly displayed in the viewfinder via a superimposition
(SI) system.
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Focusing point selection modes
As with previous Eye Control cameras, the EOS ELAN 7 E / EOS 30 has the following
three modes for focusing point selection:
(1) Automatic selection
This mode is set automatically in the Full Auto and Programmed Image Control
modes. In the Creative Zone modes, automatic focusing point selection can be set
by attempting to select a focusing point beyond the outer-most one (at top, bottom,
left, or right).
(2) Eye Control
A faster eye detection response (about 15% faster than the EOS-3’s) makes Eye
Control focusing point selection quick. Eye Control Servo AF is also provided (as
with the EOS ELAN II E / EOS 50 E and EOS IX E).
(3) Manual selection (with focusing point selection keys)
First you press the focusing point selector, then press the focusing point selection
keys (within the Quick Control Dial) to select a focusing point as you look at the
superimposed focusing points in the viewfinder. Since the keys intuitively correspond
to the top, bottom, left, and right focusing points, they make focusing point selection
very quick and easy.
The focusing point selection modes available in the respective picture-taking modes
are as follows: Only automatic selection in the Full Auto mode, automatic selection
and Eye Control in Programmed Image Control modes,
and all three focusing point selection modes in Creative
Zone modes. Also, C.Fn-11-1 enables you to select the
focusing point with the focusing point selection keys
directly without having to press the focusing point
selector first. And C.Fn-11-2 enables you to select the
focusing point with the Main Dial and Quick Control Dial
(as with the EOS-1V and EOS-3).
Note: With C.Fn-11-0 (default), the focusing point cannot be selected
with the electronic dials as enabled with C.Fn-11-2.
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New AF algorithm for Full Auto + Eye Control
The algorithm is based on the EOS REBEL 2000 / EOS 300's, but improved for the EOS
ELAN 7 E / EOS 30. When the Eye Control switch is ON in the Full Auto mode, the
focusing point selection algorithm incorporates Eye Control information during
automatic focusing point selection. The selection priority for each focusing point then
changes accordingly in multiple steps. This further improves the chances of the camera
selecting the focusing point desired by the user.
Part 1: General Information
1-6
Fig. 1-3 AF Sensor
Fig. 1-4 Focusing Point
Selector Keys