Pictures of mirrors challenge the concept of depth of field. If I was taking this shot from the position of the mirror, I'd use depth of field to make sure that the background was way out of focus, hence less distracting. Alas, the camera is focused on the image in the mirror, and if one part is in focus, it all has to be in focus. Of course, I could have altered the depth of field digitally afterwards, but that would be missing the point, don't you think?