1. A method for auto focusing a digital camera on a scene, the method comprising: determining that a change in the scene requires that the digital camera be refocused; automatically setting a focus distance of the digital camera to a lowest available distance; dividing the scene into multiple sub-frames, incrementally increasing the focus distance at a first increment without user intervention and determining a focus value at each increment for each sub-frame and for the entire scene; automatically resetting the focus distance of the digital camera to a fine scan start point corresponding to a closest focus value peak in one or more sub-frames if the closest focus value peak for the one or more sub-frames is closer than a focus value peak for the entire scene, and otherwise setting the fine scan start point to the focus value peak for the entire scene; and executing a first final scan from the final scan start point at a second increment, the second increment being smaller than the first increment.