misha's nose

So there are a couple of stray hairs in the photo. The question is, since this is a 1:1 lens, how do we know if the hair is on the cat or the sensor? This is the kind of question that keeps me up at night.

Actually not, either Halo2, a movie, Terry Pratchett, or the wife (sometimes the baby) are the things that keep me up at night. And Blipfoto of course.