Backup mechanical release lever – Nikon F3 User Manual

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Backup mechanical release lever ®

This lever is provided as an alternative method of trip

ping the shutter 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 shutter. The shutter operates
at a mechanical speed of approx. 1/60 sec. regardless of
the setting on the shutter speed dial. Even when the

batteries are exhausted, you can still make time ex

posures by setting the dial to "T" and using the backup

mechanical release lever to trip the shutter.

Coufion:

liyou advance the film while holding down the backup mecha

nical release lever, the shutter will fire immediately at the completion
of the film advance stroke, thus wasting a frame.
Also if you fail to advance the film completely and then use this lever to

trip the shutter, the mirror Q) will remain in the "up"position until the
advance lever stroke is completed.