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- With the AF-L button depressed, focus will be locked even
if
you remo
ve
your finger from the shutter release button.
-
AF
-L button can also be used
in
Single Servo Autofocus
mode.
- Simultaneous use of AE-L (Auto Exposure Lock) button
is
recommended.
In
this case, turn AF-UAE-L simultaneous
lock lever
to
(
••
) and press AF-L button.
Special Focusing Situations
To
successfully focus, whether using the
F4
's Electronic Range-
finder, an optical rangefinder, or a clear matte field, the subject
must be reasonably illuminated and have sufficient contrast.
If
the focus-not-possible indicator X appears, manually focus by
estimating distance or choose
an
alternate focus target with
the same distance, lock focus, then recompose.
The following situations are examples that are difficult to focus
and require greater concentration to secure correct focus.
1)
When shooting the following:
· Bright subject with a shiny surface, such as silver or
aluminum.
· Strongly backlit subject.
· Scene with variety of subjects located at different distances.
2)
When using a linear polarizing filter, or special filter such as
a soft-focus filter.
(A
circular polarizing filter can be used for
autofocus operation.)
R60 (red) and 056 (orange) filters will interfere with Elec-
tronic Rangefinder and autofocus operation. When using
these filters, focus manually.
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