Pentax IQZoom 115-S Operating Manual page 20

Hard-to-autofocus subjects
Like many other autofbcus cameras, the camera's
autofocus system is highly precise, but not perfect.
Some subjects may not be focused as you wish. In
such a case, use the focus-lock technique on a
subject near the actual one and equidistant from the
lens. Subjects which may fool the system include:
1. Black objects like hair, which don't reflect much
light (and therefore don't reflect infrared auto-
focus beams).
2. Wire netting, latticework, iron exercise-bars, etc.
3. Flickering light sources such as neon signs, fluo-
r e s c e n t l a m p s , T V i m a g e s , s u n l i g h t c o m i n g
through trees, etc. and subjects illuminated by
these light sources.
4. Glossy and reflective surfaces like glass, mir-
rors. car bodies. etc,
5. Fast-moving objects, like trains or automobiles
in motion.
6. Water jets, water surface, smoke, flame, fire-
works, etc., which have no distinct or consistent
form, or a subjecl in mist.
3 While depressing the shutter release button halfway,
re-aim the camera or recompose the picture, then
release the shutter.
Notes:
. You can release focus lock simply by lifting your
finger from the shutter release button.
o Focus lock function does not work in the Consecu-
tive Shootine mode.
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