Panasonic DVD Palmcorder VDR-M30PP Instruction Manual page 60

Manually focus the following objects, which may not be automatically focused (See page 59):
Objects not in
the center of
screen
Objects
moving rapidly
Object behind
glass with
water droplets,
dirt on it
60
Objects with
little variation
in brightness,
such as white
wall
Objects lit by
neon sign,
spotlight, etc.
which glares or
emits strong
light
Night view
Objects that
are far and
near at the
same time
Dark objects