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FOCUS MODES
The advanced autofocus system of the
F4
works
even
under
extremely low-light conditions - as low
as
EV
minus
1.
The
Electronic Rangefinder operates for both autofocus and
manual focusing. Manual focusing can also be accomplished
using the clear matte screen or any optional screen with an
optical rangefinder. Normally, the Electronic Rangefinder's abil-
ity
to
detect focus
is
superior
to
the human
eye.
However, there
are certain subjects that cannot be focused upon
in
any way -
such
as
shiny metallic subjects, blank walls, etc.
In
this case, X
appears and autofocus with an alternate subject
at
the same
distance or manual adjustment by estimating the distance
is
recommended.
Manual Focus with Electronic Rangefinder
Manual focus using the Electronic Rangefinder works with most
Nikon lenses, including AF Nikkor when operated manually.
(For
a complete list of usable lenses, see lens compatibility
chart, page
86.)
Lenses with a maximum aperture slower than
f/5.6 are not suitable for Electronic Rangefinder focusing,
even
though focus indicator
LEDs
appear. Focus using clear matte
field or change focusing screen to
J type.
32
1. Set focus mode selector
to
M (manual).
If
lens has an A-M
switch, set to
M.
2.
Look inside viewfinder and position focus brackets on the
main subject.
Lightly press shutter release button.