229C The Shooting Menu: Shooting OptionsChoose whether the built-in AF-assistilluminator lights to assist the focusoperation when lighting is poor.Choose the flash mode for the built-in flash in P, S, A, and Mmodes.Built-in AF-assist IlluminatorG button ➜ C shooting menuOption DescriptionOn The AF-assist illuminator lights when lighting is poor (formore information, see page 331).OffThe AF-assist illuminator does not light to assist the focusoperation. The camera may not be able to focus usingautofocus when lighting is poor.Flash Cntrl for Built-in FlashG button ➜ C shooting menuOption Description1 TTL Flash output is adjusted automatically in response toshooting conditions.2 ManualChoose a flash level. At fullpower, the built-in flash hasa Guide Number ofapproximately 12/39 (m/ft.,ISO 100, 20 °C/68 °F).AF-assist illuminator