FujiFilm FinePix F300EXR Owner's Manual page 48

Autofocus
Although the camera boasts a high-precision autofocus system, it may be unable to focus on the subjects
listed below. If the camera is unable to focus using autofocus, use focus lock (pg. 33) to focus on another
subject at the same distance and then recompose the photograph.
• Very shiny subjects such as
mirrors or car bodies.
• Fast-moving subjects.
• Subjects photographed through a window or
other reflective object.
• Dark subjects and subjects that absorb rather than
reflect light, such as hair or fur.
• Insubstantial subjects, such as smoke or flame.
• Subjects that show little contrast with the
background (for example, subjects in clothing that
is the same color as the background).
Hybrid Autofocus
The camera's hybrid autofocus system ensures fast focus, particularly when a bright, high-contrast subject is
positioned in the center of the frame.
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• Subjects positioned in front of or behind a high-
contrast object that is also in the focus frame
(for example, a subject photographed against a
backdrop of highly contrasting elements).
• Subjects positioned at some distance in front of or
behind an object that is also in the focus frame (for
example, a subject in a cage, where the both the
subject and the bars of the cage are in the focus
frame).
• Subjects dominated by regular geometric patterns,
such as the windows in an office building.
• Subjects that contain many fine details, such as a
field of flowers or other subjects that are small or
lack variation in brightness.
Focus Lock