Standard TTL FlashIn this mode, although exposure for the background is meteredby each metering system, flash output level is not determinedautomatically However, you can manually select flash outputcompensation (on the SB-24) at levels from +1 to -3 EV, forgreater personal creativity•The usable film speed for TTL flash photography is ISO25-1000; for non-TTL flash photography, it is 6-6400.•For details on speedlight operation, see the speedlightinstruction manual.•Use Nikon Speedlights. Other units may damage thecamera's electrical circuit due to incompatible voltagerequirements, electric contact alignment or switchphase.•When using a special speedlight with a time-lag provi-sion or when using a speedlight with a long flash du-ration (i.e., Medical-Nikkor 120mm f/4), adjust shutterspeed down to 1/ 125 sec. or slower.•When using a speedlight that does not allow automaticsync speed setting, set the camera's exposure modeto Manual.