Sally Mann is most famous for her hauntingly beautiful photos of her children, and the main documentary touches on her work in that area (a half-hour documentary included as a bonus goes into yet more detail, not least the controversy stirred by her pictures and issues of censorship). But, as is soon very clear, she has moved on to other interests - first landscapes, and then images of mortality, some of them shocking in their initial impact (at least to me, and I suppose anyone else who finds the idea of photographing decomposing human corpses beyond the norms of art), but then in their cumulative effect genuinely moving.
We not only see Sally Mann at work but also her talking candidly - and to a remarkable degree articulately - about what inspires her, and how her interest in different subjects for her photography has evolved. The main film is also a touching portrait of her marriage to her husband, a one-time artist (and so sympathetic to her work) who now works as an attorney, but now suffering a gradually wasting condition in his muscles. Sally Man talks candidly about her feelings about her husband, and movingly talks about how they first met (when evidently he was someone of impressive physique, so making his wasting disease the more poignant).
Another interesting extra is a talk and Q&A session Sally Mann gives at a symposium, in which she speaks about the artist's responsibility not only to their art but also to their subject.
This is warmly recommended to anyone who is in the least bit interested in Mann's work, and indeed to anyone wishing to see a thought-provoking documentary about art, raising questions about what it can do in terms of human expression (something beyond mere representation).