259A Custom Settings: Fine-Tuning Camera SettingsChoose the flash mode for the built-in flash in P, S, A, and Mmodes. When an optional SB-500, SB-400, or SB-300 flash unit isattached and turned on, this option changes to Optional flashand is used to choose the flash mode for the optional flash unit.e: Bracketing/Flashe1: Flash Cntrl for Built-in Flash/Optional FlashG button ➜ A Custom Settings menuOption Description1 TTL Flash output is adjusted automatically in responseto shooting conditions.2 ManualChoose a flash level. At full power, the built-inflash has a Guide Number of 12/39 (m/ft., ISO 100,20 °C/68 °F).4 CommandermodeThis option is available when an optional SB-500flash unit is mounted on the camera accessoryshoe. In commander mode, the SB-500 functionsas a master flash for wireless remote control ofgroups of optional off-camera flash units (0 260).A ManualA Y icon flashes in the viewfinder and 0flashes in the information display whenManual is selected and the flash is raised.
