FUJICA AX-3 Owner's Manual page 26

3. To prevent light from entering through the Eyepiece, shut the Eyepiece
Shutter with the Eyepiece Shutter Lever.
4. Swing the Main Switch all the way out toward you so that the letters
"SELF" appears in the Main Switch Window.
5. Press the Shutter Release gently down. (You will hear the sound of
precision electronics beating time until the shutter trips 12 seconds
later.)
Note: Be careful after you start the Self
Timer because the shutter will trip the
instant the Main Switch is moved to ON or
OFF.