Nikon D100 Product Manual - Page 170

Menu Guide-Custom Settings Custom Settings Custom Setting 22: AF Assist This option controls whether the AF-assist illuminator lights to help with the autofocus operation when the subject is poorly lit ( 72). CSM MENU F22 AF Assist Illuminatior ON ON OK OFF OFF Option ON (default) OFF Description AF-assist illuminator lights automatically when subject is poorly lit. AF-assist illuminator off. Custom Setting 23: Flash Mode By default, the amount of light produced by the built-in Speedlight is controlled automatically using D-TTL flash control ( 95). Using this option, you can set the built-in Speedlight to fire at full output with every photograph (manual mode). CSM MENU F23 Built-in Flash Mode D-TTL auto flash OK Manual flash Option Description D-TTL auto flash (default) When built-in Speedlight is raised, flash output is adjusted automatically in response to shooting conditions ( 99). Flash output can be adjusted using flash exposure compensation ( 102). Manual flash When built-in Speedlight is raised, flash fires at full output with every shot (GN at ISO 200 18/59, at ISO 100 12.7/42, m/ft). Flash exposure compensation indicators ( ) in control panel and viewfinder blink on and off. No monitor pre-flash is emitted, allowing the built-in Speedlight to function as a master flash to drive optional slave flash units. 158