I recently tried to get some shots of two dogs playing. I don’t expect perfect photos when the dogs are wrestling and running about. I just don’t have the chops for that. But people like them, and I occasionally get a shot that I am truly satisfied with. But… on the two days in question the subjects were Aspen and River — a white dog and a black dog. That’s brilliant white and pitch black. Okay, to be honest, River’s coat has dark brown highlights. But he’s still quite dark. The contrasting subjects pose a dilemma for the camera’s meter….