a2: Center Focus
Point
This
option
(available in all shooting modes) determines the
size
of
the center focus
point.
Viewfinder
display
................•.........•...................
Option
[n]
Normal
zone
(default)
[[
l]
Wide
zone
D
D
Description
Focus
on stationary subjects
that
can be easily framed
in the focus point.
Focus
on moving subjects. Not available when
Auto-
area
is
selected for Custom Setting a1 (AF-area
mode).
See
page
54
for more information on focus settings.
a3:
Built-in
AF-assist
Illuminator
Choose whetherthe built-in AF-assist illuminator lights
to
assist
the focus operation when lighting
is
poor. This option
is
available in all shooting modes except
~
and
~
.
••.
" n _
'N
__ '
Option
Description
If
the
subject
is
poorly lit,
the
AF-assist illuminator will
light
to
assist
the
focus
On
operation in single-servo
AF
(AF-S
selected for autofocus mode, or single-servo
AF
(default) selected in
AF-A
autofocus mode) when Single
point,
Auto-area, or
3D-tracking
;
(11
points)
is
selected for Custom Setting
a1
(AF-area mode) or when Custom
,Setting a1
is
set
to
Dynamic
area and the center focus
point
is
selected.
.................
.;:::::.c,
Off
The AF-assist illuminator does
not
light
to
assist
the
focus operation. The camera
may
not
be able
to
focus using autofocus when
lighting
is
poor.
................................•......
.
• The AF-Assist
Illuminator
The AF-assist illuminator
has
a range
of
about
0.5-3.0 m
(1
ft. 8
in.-9
ft. lOin.); when using the
illuminator,
use
a lens
with
a focal length
of
24-200
mm
and remove the lens hood.
•
See
Also
See
page
231
for restrictions on the lenses
that
can be used
with
AF
assist.
174
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