Backup Mechanical Release Lever; Depth-Of-Field Preview Button - Nikon F3 High-Eyepoint Instruction Manual

Backup mechanical release lever
®
This lever is provided as an alternative method of trip-
ping the shutler in case the camera's batteries become
weak or completely exhausted . To operate the lever , first
use your fingernail to pull it down to the ready position.
Then push it down to trip the shutler. The shutler operates
at a mechanical speed of approx .
1160 sec. at
any setting
on the shutler speed dial except "T." At "T," the shutler
remains open until the dial is turned to another setting .
To conserve batlery power, it's recommended to use the
backup mechanical release lever to trip the shutler at
"T." Turn the power switch off, and make sure the LCD
shutler speed is off before tripping the shutler. This
prevents batlery drain.
Caution :
If you odvance the film while holding down the backup m echa-
nical release lever, the shuller will fire immediotely at the completion
of the film advonce stroke, thus wasting a frame.
Also if you fail to advance the film completely and then uSe this lever to
tnp the shuller, the mirror
®
will remain in the "up" position until the
advance lever stroke is comple ted.
Depth-of-field preview button
CD
This control allows you to get a visual impression of the
various parts of the scene in front of and behind the main
subject which will appear sharp in the final photograph
(see the photos on the next page. ) To operate this control,
push the butlon while looking through the viewfinder. If
the lens is set to anything other than maximum aperture,
the image on the focusing screen will g ive you an indi-
cation of exactly what will be in focus in the final photo.
The image progressively gets darker as the lens aperture
gets smaller.
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