If the tone of this documentary about the celebrated photographer is rather too reverential, that's because it was made by her younger sister Barbara.
So there are no awkward questions about the possibility that Leibowitz has sold out to (indeed, helped to create) the Vanity Fair inflation of celebrity culture – "iconic" is the bland word everyone grabs for.
But there is interest in the recollection of their peripatetic family life (their father was an air force officer who served in Vietnam) and the photographer's early relationship with film: "The camera was another member of the family."
Her 1970s photographs – of Lennon and Yoko, of Richard Nixon leaving the White House – stand almost as a rebuke to the hoopla of wind machines and wigs she favours nowadays.
Watch the 'Annie Leibovitz: Life Through a Lens' trailer