Othercontrols; Shutter Release Button; Backup Mechanical Release Lever - Nikon F3AF Instruction Manual

OTHERCONTROLS-------------------------
Shutter Release Button
75
Depressing the button halfway switches on the exposure meter
and autofocus function and activates the viewfinder LED and
LCD displays for focus/exposure information . Both displays stay
on for approx. 16 sec. , even after taking your finger off the but-
ton , then turn themselves off automatically to conserve battery
power. Depressing the button all the way down releases the
shutter. The shutter release button is threaded in its center to
accept a standard cable release for tripping the shutter with the
camera mounted on a tripod.
Notes:
1)
The shutter cannot be tripped using the shutter release button unless :
a) the camera's power switch
@
is turned on, b) the film advance lever
1M!
is stroked completely to cock the shutter, and c) the batteries are
in proper working order. To release the shutter when the batteries are
dead, use the backup mechanical release lever
® ,
referring to the
next page.
2) At the B setting, unless you hold the shutter release button down all
the way, the shutter may close prematurely.
3) 00
not screw
a
tripod into the camera 's tripod socket @ too tightly.
42
Backup Mechanical Release Lever
(6
This lever is provided as an alternative method of releasing the
shutter in case the camera's batteries become weak or com-
pletely exhausted. To operate the lever, first use your fingernail
to pull it down to the ready position. Then push it down to trip
the shutter. The shutter operates at a mechanical speed of
approx. 1160 sec. at any setting on the shutter speed dial , except
T. At T, push down the backup mechanical release lever with
the power switch
@
off.
Caution:
If
you advance the film while holding down the backup mechan·
ical release lever, the shutter will fire immediately at the completion of
the film advance stroke, thus wasting
a
frame. Also, if you fail to advance
the film completely and then use the lever to trip the shutter, the mirror
®
will remain in the " up " position; when the additional stroke is made to
complete film winding, the shutter will fire , also wasting
a
frame.