An episode about positives, on a show called Negative Thinking.

Today I open a brand new drawer: our first Film Story, the biography of a material instead of a machine. And I'm starting with the film closest to my heart, the one with no negative at all. With reversal film, the very piece of film that sat behind your shutter develops into the finished photograph. No master copy in a drawer. A negative is a source. A slide is a survivor. You're holding the moment's only living witness.

That's why it shoots the way it does: about one stop of forgiveness, no fixing it later, because there is no later. Slide film is the sport played without a net. Its history is a whole century: Kodachrome, invented in 1935 by two classical musicians; National Geographic and family slide nights; the last roll developed at a small shop in Kansas at ...