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HARD-TO-AUTOFOCUS SUBJECTS
The autofocus system is highly precise, but not
perfect. Some subjects may not focus as you
wish. In this case, use the focus-lock technique
on another subject near the actual one and
equidistant from the lens. Subjects which may
fool the autofocus system include:
a) Black or very dark objects, which don't reflect
much
light (and
therefore
don't
reflect
infrared autofocus beams.)
b) Wire netting, latticework, iron exercise-bars,
ed by these light sources.
Note:
d) Glossy and reflective surfaces like glass, mir-
`
ror, car bodies, etc.
e) Fast-moving objects, like trains or automo-
biles in motion.
f) Water jets, water surface, smoke, flame, fire-
works, etc. which have no distinct or consis-
tent form, or a subject in mist.
e You can release the focus lock simply by lifting
your finger from the shutter release button.
19
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