Canon EOS 40D Service Manual page 14

●Shooting backup
Images in the CF card can be backed up to
external media. Besides the quick backup feature
also found in the EOS-1D Mark III, the folder to
back up the images can be created or selected. Only
checkmarked images can also be backed up (Fig.
010).
３）EOS Integrated Cleaning System
The Self Cleaning Sensor Unit is the same type as in the EOS-
1D Mark III (Fig. 011). The specifications for acquiring and
appending Dust Delete Data to the image are the same as with
the EOS-1D Mark III.
４）Shooting functions
⑴Autofocus
● N ine cross-type AF points (center AF point sensitive to
vertical and horizontal lines at f/2.8).
The newly-developed AF sensor (Fig. 012) with nine
cross-type AF points greatly boosts AF performance. The
AF sensitivity is EV -0.5 - EV 18.
・ Nine cross-type AF points
All AF points work as cross-type points at f/5.6. High-
precision AF is attained with fewer AF failures with hard-
to-focus subjects.
・ First EOS with cross-type AF sensitive to f/2.8
The center AF point has a cross-type AF sensor sensitive to vertical and horizontal
lines at f/2.8.
＊ T he f/2.8 sensor is a diagonal, cross-type sensor so that it does not obstruct the f/5.6 sensor positioned
vertically at the center.
・ Handles extreme defocus
The sensor can handle extreme defocus. It can still focus even when the scene is
way out of focus.
●AF Start button
(=EOS-1D Mark III)
Like the EOS-1D Mark III, the <AF-ON> button is provided.
●AF mode selection
Like the EOS 30D, the AF mode (One-Shot AF, AI Focus AF, AI SERVO AF) is selectable
even in the Creative Zone modes.
●AF point selection
Like the EOS 30D, you can use the Multi-controller or Main/Quick Control dial to
select the AF point while looking at the superimposed AF point in the viewfinder or the
LCD panel's AF point selection display.
(=EOS-1D Mark III)
(=EOS 30D)
(=EOS 30D)
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General Information
Fig. 010 Backup
Fig. 011 Self Cleaning
Sensor Unit
Fig. 012 AF sensor