Nikon F4S - Focus Modes; Manual Focus with Electronic Rangefinder

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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.
1.
Set
focus
mode
selector
to
M
(manual).
If
lens
has
an
A-M
switch, set to M.
AA iy
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
{/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.
2.
Look
inside
viewfinder
and
position
focus
brackets
on
the
main
subject.
Lightly
press
shutter
release
button.
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