Sally Mann caused a stir 10 years ago by taking photographs of her own children, mostly naked, posed in gothic surroundings. The pictures were enormously successful, but they didn't please the Christian Right. At the time, filmmaker Steven Cantor made a short film about Sally Mann which won an Oscar. Now, he has gone back to make a full-length film about Mann and her art.

What is really exciting about this film is its attention to the process of making photographs. You learn about the mixture of hi and low-tech that characterises Mann's work. More importantly, you also find out about her subject matter. Her father was a local doctor who compiled images of death for most of his life. Many of Sally Mann's recent sequences of photographs deal with death - through pictures of Civil War battlefields or, more macabre, images of decaying cadavers being studied for scientific research. But Sally Mann is also still taking photos of her own family. Her beautiful dog features in many photographs, as does her extremely handsome husband. This would not in itself be remarkable, or worthy of a film, unless Sally Mann was a truly great photographer, which she is.