Nikon F4S - Page 71

MIRROR
LOCKUP
LEVER
A
highly
efficient,
tungsten-alloy
shutter
balancer
is
incorporat-
ed
in
the
shutter
unit.
The
balancer
operates
during
shutter
operation
to
overcome
vibration
normally
caused
by
the
shutter
curtain
in
other
cameras.
When
using
super-telephoto
lenses
or
doing
photomicrogra-
phy,
it
is
necessary
to
reduce
camera
vibration
to
the
absolute
minimum.
To
lock
the
reflex
viewing
mirror
in
the
“up”
position,
push
in
the
depth-of-field
preview
button
and
rotate
the
mirror
lockup
lever
counterclockwise
until
it
stops.
With
the
mirror
locked
up,
you
cannot
operate
the
camera
in
any
Auto
Exposure
or
autofocus
mode,
even
though
the
view-
finder
LCD
may
indicate
otherwise.
Any
indication
of
light
by
the
LCD
is
a
result
of
spurious
light
entering
through
the
viewfinder
eyepiece.
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pp e PE
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