Canon EOS-1D, Instructions Manual

Page: 61 / 176

61
Using A
utof
ocus (AF)
3
AF Mode Selection
One-Shot AF for Still Subjects
Pressing the shutter button halfway
activates AF operation and achieves
focus once.
s
The AF point which achieves focus flashes briefly
and the focus confirmation light <
> in the
viewfinder lights at the same time.
•
With evaluative metering, the exposure setting
(shutter speed and aperture) will be set when focus
is achieved. The exposure setting and focus will be
locked as long as the shutter button is pressed
halfway. You can then recompose the shot while
retaining the exposure setting and point of focus.
Focusing an Off-Center Subject
Focus confirmation light AF point
Aim the Area AF or AF point over the subject and press the
shutter button halfway to focus.
1
Keep pressing the shutter button halfway and recompose the
picture as desired.
2
Take the picture.
3
•
When the < > switch is set to < >, the beeper will sound when focus is
achieved.
•
If focus cannot be achieved, the focus confirmation light < > in the viewfinder
will blink. If this occurs, a picture cannot be taken even if the shutter button is
pressed fully. Reframe the shot and focus again. Also see “When Autofocus Fails
(Manual Focusing)” on page 73.
To focus a subject not covered by the Area AF ellipse, follow the procedure below. This
technique is called focus lock.
•
Focus lock works only in the One-Shot AF mode.