7. Set the camera's shutterspeed for proper syn-chronization.Set the shutter speed dial to the prop-er synchronization speed for elec-tronic flash (e.g., set the F3 to the"X" setting). For details, refer to thechart on page 11.8 Set the exposure calcu--lator dial @ .Turn the dial until the ASAIISO filmspeed index @is opposite the numberfor the speed of the film in use. Thethree thick color-coded lines @above the £lstop scale @ indicate thethree usable f/stops for automaticoperation and the distance scales @below the usable £lstop scales giveyou the range of flash-to-subject dis-tance. For example , if you're usingASAIISO 100 film, the usable £lstopsare f/4, below the orange line, £15.6,below the yellow, and £18, below theblue. The range of flash-to-subjectdistance for each £lstop is 0.6m to8m (2 to 26 ft.), 0.6m to 5.6m (2 to18 ft.), and 0.6m to 4m (2 to 13 ft.),respectively. (For more informationon selecting the flstop, refer to "Ex-posure Calculator Dial" on page 12.)7