Canon F1 Quick Start Manual page 2

Set the ASA film speed scale at ASA 100 and the. shutter speed at 1/2000 of a
second. Then check the position of the meter needle in the viewfinder while at the
same time you turn the switch of the power source battery to "C".
When you set the film speed scale, lift and turn the corresponding ring around the
shutter speed dial. To set the dial at a shutter speed of 1/2000 of a second, turn it
clockwise until it stops and cannot be turned any more.
Film Advance Lever
A single stroke of 180 is possible as well as a series of short strokes
.
When film advances, shutter release and mirror operation are activated. When
shutter release button is pressed and a frame is exposed, it is ready to wind for
another film advance.
Film Winding and Shutter Release Button Lock