Canon EOS 10D - Manual (Page 65)

65
Focusing
4
Selecting AF Mode
One-Shot AF for Still Subjects
Focus confirmation light
AF point
Pressing the shutter button halfway
activates AF operation and achieves
focus once.
s The AF point which achieved focus will flash briefly
and the focus confirmation light in the viewfinder will
light 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.
With C.Fn-10-1, you can disable the AF point from flashing in red (superimposed
display) when focus is achieved. (
→p.149)
Focusing an Off-Center Subject
To focus an off-center subject not covered by any of the seven AF points, follow the procedure
below. This technique is called focus lock.
Focus lock works when the AF mode is set to One Shot AF.
Aim the AF point over the subject and press the shutter button
halfway to focus. 1
Keep pressing the shutter button halfway and recompose the
image as desired. 2
Shoot. 3
If focus cannot be achieved, the focus confirmation light < ●> in the viewfinder will blink.
If this occurs, an image cannot be captured even if the shutter button is pressed fully.
Reframe the shot and focus again. Also see “When Autofocus Fails (Manual Focusing)”
on page 71.