A mirror can add a lot to a photograph. It can add depth or light or the presence of something you wouldn't normally be able to see. It can double the appearance of something key to the composition. It can change the angle of some object. It can flip part of the image and force you to look at it in a different way. For me, though, probably the best thing a mirror brings to a photograph is evidence that you're not a few feet from a vampire. This guy in this photo: he's not a vampire. Good work mirror.
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