Pentax ES II ES II Manual - Page 23

SELF-TIMER The self-timer of the ES II releases the shutter after 5 - 11 seconds, depending upon how far anti-clockwise you turn the cocking lever. When using the self-timer, do not depress the shutter release button . . . it will immediately release the shutter without delayed action. Turn the cocking lever down 90'- 180*. Move the self-timer start lever as indicated . . . the self-timer will start operating. This self-timer has a unique interrupt function. Even after the self-timer has started to run, you can stop it by moving the start lever back to normal position as long as the cocking lever is between 180 and 90 . You can re-start the self-timer by turning the cocking lever down again and moving the start lever over. Do not leave the cocking lever in "interrupt" position for an extended period, as this may damage the spring. 21