I just could not resist this.
The light is a 7 watt night light. Focussing instantanious with no hunting. The next brick up not quite instantanious but no hunting. The brick above and hunting begins.
Exif shows lens wide open at f4.4.
Exif is in the main pic.
Attatched screen shot shows the focus area.
Camera ............... oh yes nearly forgot, its a Nikon.
Don