Nikon Nikkormar FT3 - Self-Timer; Mirror Lock

SELF-TIMER
The built-in self-timer can be used to trip the shutter
in approximately eight seconds delay. To cock the
self-timer, turn the lever downward as far as it will
go. When
the shutter release button is pressed, the
timer starts. The self-timer is independent of the shut-
ter mechanism and can be set before or after the shut-
ter is wound. Do not use at "B" setting.
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MIRROR LOCK
The reflex mirror can be locked in the "up" position
out of the optical path for use with the Fisheye-
Nikkor 6mm f/5.6 and the OP Fisheye-Nikkor
lOmm f/5.6, whose rear elements protrude into the
camera body and interfere with the movement of
the mirror. Simply slide the mirror lock downward
and the mirror will remain locked up. To return the
mirror to its original focusing and viewing position,
slide the lever up again.