Kameni stopped taking pictures in 2007, after losing his sight to cataracts. “I ask him about the photographs, and he can remember every picture he took, even though he cannot see them,” says Hoffman. “We go through the negatives, and I describe the photograph to him, and he can remember the day, month and year that they were shot.” During his career, Kameni developed a double exposure process in his darkroom, which involved him flipping the negative and moving the photo paper to create an inverted image of the same photograph. He also played extensively with light. “How he manages to backlight the images is amazing,” says Hoffman.