NIGERIA'S Emmanuel Iduma is many things: writer, editor, publisher, critic and photographer. In 2022 he combined these skills to introduce a newsletter, Tender Photo, sent to subscribers twice a week. It has since become an important platform for African photographers, writers, critics and curators. Published on Substack, it has become so widely popular that it was a featured publication on the online newsletter support site. Author TINASHE MUSHAKAVANHU, Junior Research Fellow, University of Oxford Iduma is the author of three books: I Am Still With You, a memoir on the Nigerian Civil War; A Stranger’s Pose, a travelogue; and The…