Olympus C-170 - Manual (Page 20)

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If correct focus cannot be obtained
The camera automatically detects the focus target in the frame. The level
of contrast is one of the criteria it uses to detect the subject. The camera
may fail to determine subjects with lower contrast than the surroundings or
with an area of extremely strong contrast in the frame. If this happens, the
simplest solution is to use the focus lock.
1
Position the AF target mark on
the subject you want to focus on.
• When shooting a hard-to-focus or fast-
moving subject, focus the camera on an
object about the same distance away as
the subject.
2
Press the shutter button halfway
until the green lamp lights.
• When the focus and exposure are
locked, the green lamp lights.
• When the green lamp blinks, the focus
and exposure are not locked. Release
your finger from the shutter button,
re-position the AF target mark on the subject and press the shutter button
halfway again.
3
Keeping the shutter button
pressed halfway, recompose
your shot.
How to focus (focus lock)
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AF target mark
Shutter button
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Green lamp