Photographer and artist, born Grömnitz 1805; studied miniature portrait painting in Paris, where he learnt daguerreotype process from Daguerre in 1839; opened daguerreotype studio with Hermann Biow (1804-1850) in Hamburg in 1842 (partnership only lasted a year); assisted by wife Anna Carolina Stelzner (1808–1875) in tinting images; produced paper prints from 1854 but plagued by failing eyesight; business ceased in 1862