Portrait of a man by a river

A portrait of a young man standing on the banks of a river. The picture was taken on a 'red border' Kodachrome slide, so I would guess it must have been around about 1955 - 1960 when the image was shot, but its a very clear and well taken portrait. I particularly like the way the exposure was long enough to blur the fast moving water behind the man, but his features are sharp and clear. The only impovement, in my opinion, would have been if the man was slightly more to the side of the frame, rather than close to the centre.