Main features: Matrix or center weighted TTL pattern, matrix balanced or center weighted fill flash, first or second curtain flash sync, auto zoom head position for coverage from 24mm to 85mm, repeating flash, LCD panel, flash head tilts up and swivels for bounce lighting. AF-assistIlluminator for focusing in dim light. In Auto mode there are 6 settings from f/2 to f/11 at ISO 100 as well as Manual settings from full to 1/64 power in 1/3 steps. Optional external battery packs SD-7 (C-cell), SD-8 (AA). SC-17 cord for off camera TTL operation.