When Autofocus Fails
Autofocus can fail to achieve focus (the focus confirmation light <O>
blinks) with certain subjects such as the following:
Subjects difficult to focus
® Low=contrast subjects
Example: Blue sky, solid-color walls, etc.
® Subjects in low light
® Extremely backlit or reflective subjects
Example: Car with a reflective body, etc.
® When both near and far subjects are covering the AF points
Example: Animal in a cage, etc.
® Repetitive patterns
Example: Skyscraper windows, computer keyboards, etc.
In such cases, do one of the following:
(1) With One-Shot AF, focus an object at the same distance as the
subject and lock the focus before recomposing. (p.46)
(2) Set the lens focus mode switch to <MF> and focus manually.
If an Extender (s0!d SepaiatelY)is attached and the maximum aperture Of
the Jens is f/5.6 or smaller (larger f/number), AF will not be possible (except
Live mode AF), For detail s, see the Extender!s inst[uction manual
For the cases AFcan fai! to achieve focus with Live mode AF, see page 106,
162
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