Pentax IQZoom 80-E - Hard-to-Autofocus Subjects

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3. While holding the shutter release button
halfway, re-aim the camera or recompose the
picture, then release the shutter by depress¬
ing the shutter release button all the way.
Note:
• You can release the focus lock simply by lift¬
ing your finger from the shutter release but¬
ton.
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 in¬
clude:
a) Black or very dark objects, which don’t re¬
flect much light (and therefore don’t re¬
flect infrared autofocus beams.)
b) Wire netting, latticework, iron exercise-
bars, etc.
c) dickering light sources such as neon
signs, fluorescent lamps, TV images, sun¬
light coming through trees, etc. and sub¬
jects illuminated by these light sources.
d) Glossy and reflective surfaces like glass,
mirror, car bodies, etc,
e) Fast-moving objects, like trains or auto¬
mobiles in motion.
f) Water jets, water surface, smoke, flame,
fireworks, etc. which have no distinct or
consistent form, or a subject in mist.
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