Samuel Dwight Humphrey (1823-1883) was a prominent American daguerreotypist. He was the editor of The Daguerreian Journal which he began to publish in 1850, later changing the title to Humphrey's Journal Devoted to the Daguerrean and Photogenic Arts. He was one of the first people to take a photograph of the moon. His works include: A System of Photography (1849), The American Hand Book of the Daguerreotype (1853) and A Practical Manual of the Collodion Process (1857).