Auto tracking focus – Canon E850 User Manual
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Auto Tracking Focus
Use this function for best results when shooting a moving subject, or when
you want to focus on a subject which is not in the centre of the viewfinder.
• Frame subject in the centre of autofocus zone using normal autofocus.
• Press FOCUS button and select auto tracking focus mode. Auto tracking
focus zone (ATF zone) appears in the viewfinder. The subject with the
highest contrast inside the ATF zone will be detected, and tracked so they
are kept in the centre of the ATF zone. When subject has been focused
properly, ATF zone will begin to flash rapidly.
• ATF zone will now follow subject’s movements within the viewfinder
screen.
(This function also lets you pan the camera, to keep track of a moving
subject.)
• If subject leaves viewfinder screen, ATF zone will return to the centre of
viewfinder and flash slowly.
When the focal depth of the subject is shallow, the ATF zone appears as a
small box. The ATF zone can follow movements of the subject very freely.
When the focal depth of the subject is of medium depth, the ATF zone
appears as a medium sized box. The ATF zone can follow movements of
the subject back and forth, but cannot follow movements up and down.
When the focal depth of the subject is deep, the ATF zone appears as a
large box, and does not move.
• Depth of field is determined by focal distance and size of the shutter
aperture.
©
Shallow
@ Medium Depth
(
3
)
Deep
Telephoto Focal distance Wide angle
40
A dvanced Functions