Louise,
I agree with everything Steven has pointed out. I also want to add that the man's hair has no light/shine on it, and thus no rounding of the form of his head. Compared to the hand and gun, the hair and even the face do not have the highlights that I would expect to see in the corresponding planes. For instance, the top of his hand is a rosier, slightly lighter color. I would expect to see that color on his right (our left) temple and cheekbone, and a corresponding highlight in the hair. And the cool highlight on the left (our right) edge of his face leads me to believe he was painted inside, with warm ambient light, and a window providing side-lighting.
Alex
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