Christoph’s photographs as a Black Star photographer have been published in Life, National Geographic, and many other publications. His first African assignment was in 1969.
“In the beginning during the early ’70s I visited Ghana several times and then I did a lot of work in Ethiopia during the first big drought of 1974,” Christoph told Eric Makin . “I was there when Haile Selassie  was overthrown and got caught up in the coup.
“That was a pretty hairy experience…The people were on the streets, it was very dangerous, and when I was trying to get out to the airport on one of the last planes leaving for Europe with Air Italia, I had a cab driver who started to drive me to the airport, but the people started to stone the cab … The driver wanted to put me out onto the street and I had to ‘force’ him to drive to the airport; otherwise I would have been killed. I’d rather not say how I forced him.
“In fact, I was caught up in a few coups. I was in Ghana when Rawlings took over from Acheampong. In addition I was in Burkina Faso, Niger, Senegal, Gambia and Guinea. At a later stage I was in Rwanda covering the genocide there.”
In the 1990s, the German-born Christoph developed a fascination with African animism. In 1995, he published the book Voodoo: Secret Power in Africa . More recently, Christoph delved deeper into African religious beliefs with Soul of Africa: Magical Rites and Traditions .
Today’s images in the Black Star Photoblog show Ghanaian adherents of Mami Wata .