Nikon F3 - Film Handling Mechanisms

Film advance lever @
The film advance lever is specially contoured to fit the
thumb and is coaxial with the shutter release button.
It has a 30
0
stand-off with a throw of 140
0
and may be
operated in one complete stroke or a series of shorter ones .
Frame counter @
To keep track of the number of exposed frames, the frame
counter is graduatea from two frames below 0 up to 40. 23
Blue numerals appear every 5 frames (0, 5, 10, etc.) with
dots in between. White marks
at 12, 20, 24, and 36 indi-
cate the number of frames available on most film car-
tridges. When making blank shots with the shutter speed
dial set to "A," the shutter will fire at 1/S0 sec . until the
frame counter reaches "1." In addition, the LCD shows
SO in the finder. Or if you set the dial manually between
1/125 and 1/2000 sec ., the shutter will still fire at 1/S0 sec.
In
the finder, an "MSO" is displayed . However, if the
speed is manually set to 1/S0 sec. (X) or below, the shutter
will fire at
the speed set and the speed will be displayed
by the LCD. Therefore, to speed up film loading, set the
dial to "A" or to 1/S0 sec. (X) or above. "T" should not be
used when making blank shots as the shutter will remain
locked open.