If you use metric, adjust accordingly. But on with the lesson. Guide number divided by distance equals f-stop. Guide number divided by distance equals f-stop. Guide number divided by distance equals f-stop.
Guide number divided by distance equals f-stop.
Guide number divided by f-stop equals ideal subject distance. So you fire the picture as he reaches the spot 4 feet above your head. If the calculated setting didn't give a good exposure, chances are one of the repeat shots will. I turned on the strobe to change picture styles. With the strobe, his face and eyes are now visible.