F-14Tips on Speedlight Care and Reference InformationFSpecificationsElectronic construction Automatic Insulated Gate Bipolar Transistor (IGBT) andseries circuitryGuide number (at35 mm zoom headposition, in FX format,standard illuminationpattern)34.5/113 (ISO 100, m/ft)Effective flash outputdistance range (ini-TTL, auto apertureflash or non-TTL autoflash mode)0.6 m to 20 m (2 ft to 65.6 ft) (varies depending oncamera’s image area setting, illumination pattern, ISOsensitivity, zoom head position, and lens aperture inuse)Illumination patternThere are 3 illumination patterns: standard, even,center-weightedThe light distribution angle is automatically adjustedto the camera’s image area in both FX and DX formatsAvailable flash mode• i-TTL• Auto aperture flash• Non-TTL auto flash• Distance-priority manual flash• Manual flash• Repeating flashOther availablefunctionsTest firing, monitor pre-flashes, AF-assist illuminationfor multi-point AF and modeling illuminationNikon Creative LightingSystem (CLS)A number of flash operations are available withcompatible cameras: i-TTL mode, Advanced WirelessLighting, modeling illumination, FV lock, Flash ColorInformation Communication, auto FP high-speed sync,AF-assist illumination for multi-point AF and unifiedflash control