Nikon Camera F3AF - Manual (Page 68)

Frame Counter
®
To keep track of the number of exposed frarnes, the frame
counter is graduated from two frames below 0 up to 40. Blue
numerals appear every 5 frames (0, 5, 10, etc.), with dots in
between. White marks at 12, 20, 24, and 36 indicate the number
of frames available on most film cartridges. When making blank
shots with the shutter speed dial @ set to "A," the shutter will
fire at 1/80 sec. until the frame counter reaches the first frame.
In addition, the LCD shows 80 in the finder. Or, if you set the dial
manually between 1/125 and 1/2000 sec., the shutter will still
fire at 1/80 sec. In the finder, an M 80 is displayed. However, if
the speed is manually set to 1/80 sec. (X) or below, the shutter
will fire at the speed set with the LCD indicating that speed.
Therefore, to speed up film loading, set the dial to A or to 1/125
sec. or above.
When the camera back ® is opened, the frame counter auto­
matically resets to two frames below zero.
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