Mirror lock-up control
The mirror lock-up control is usedin conjunc-
tion with the Rokkor 21mm F4 or F4.5 ultra
wideangle lenses.When activated, the mirror is
locked in an "up" position to prevent it from
coming into contact with the rear element of
the lens whi ch projects into the interior of the
camera.
To operate, turn the mirror lock button
downward (clockwise) until it stops. The dis-
tance of movement is approximately 135°.
The mirror will return to its usual operation
when the lock button is returned to the red
mark.
The mirror lock button operates independ-
ently of the shutter releaseand film advance
and can, therefore, be activated at any time.
When the mirror is locked in an "up" posi-
tion, the exposure meter of the camera
cannot operate.
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