Nikon F3 - Memo Holder; Shutter Release Button

-CONTROLS IN DETAIL-continued----------
22
Memo holder @
As a reminder of the film type and the number of ex-
posures on the roll in use, clip off the end of the film
carton and insert it into the memo holder.
Note: At the "B" selling, unless you hold the shutler release butlon down
all the way,
the shutter may close prematurely .
Shutter release button @
Slight pressure on the shutter release button switches on
the exposure meter. Pushing the button all the way down
releases the shutter. The shutter release button is thread -
ed at the center to accept a standard cable release.
When battery power fails, the F3's electromagnetically
controlled shutter ceases to operate . You cannot release
the shutter release button unless you use the backup
mechanical release lever ®.
To lock the shutter release button when the camera is not
in use,
turn the power switch to the "OFF" position.