The method given by Robert is the one which is most easily understood and offers the most control. If want to use the sensor, proceed as follows:(posted 8784 days ago)If you use the flash as you would indoors, I would expect it to radiate too much light rather than too little, lighting up the shadows to a degree that they are no longer recognizable as shadows at all. Therefore, use the flash as indoors, but enter an EI about one f-stop higher than you are actually using, or stop down your camera one f-stop beyond what's recommended by the flash.