TTL AUTO FLASHTTL Auto Flash lets you select any aperture from f/1.4 to f/32 tomatch the shooting distance range with automatic TTL controlof the flash exposure .* For autofocus operation with the F-501lN2020 , choose andset the camera's focus mode to Single Servo Autofocus. (Fordetails about autofocus flash photography , see pages 64 to 65) .* Choose and set the camera 's film advance mode to single -frame shooting .* With the Nikon F-501/N2020 or F-301/N2000 , set thecamera's exposure mode to aperture-priority auto or manualexpousre mode .1. Set S8 -24 's flash mode selector to TTL , and the flash syncmode selector NORMAL .602 Using the adjustment buttons, select the aperture that best• matches the shooting distance.For example:With the zoom setting at 35mm and the film speed inde x at ISO100 , selecting fl8 lets you take pictures of subjects 0.6m to 4m(approx. 2ft. to 15ft.) away.Shooting distance range varies according to aperturevalue , film speed andlor zoom setting. For shootingdistance range , see page 69 .