I had never considered a flash outside in daylight before, but I'm learning this isnt that odd... Would a flash of been my best option to bring more light to the face in this picture, or is there something else I need to do. Just how far away can a flash reach? And really, which flash can I get for my camera that isnt super expensive? It was overcast, 200mm, 5.6, 1/320, iso 800. I have a rebel xt.