Nikon EL2 - Manual (Page 22)

Shutter Release Button Lock
A special control is fitted around the base of the shut­
ter release button to provide for greater ease of opera­
tion when using the EL2 with the Auto Winder AW-1
mounted for automatic film advance. With the shutter
release button lock, the film-advance lever’s meter
ON/OFF and shutter button lock functions are dupli­
cated to enable positioning of the lever flush to the
body while using the Auto Winder. To operate the
camera via the shutter release button lock, simply
switch the lock to the left to reveal the red meter ON
index; in this position, the meter is on and the shutter
button is unlocked for normal release operation. When
not using the Auto Winder, switch the lock back to the
right and operate via the film-advance lever.
Note; Whenever the camera is stored, be sure that the shutter
release button lock (as well as the film-advance lever) is set to
the “meter-OFF” position to ensure against accidental battery
drain.
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