Carnavalet Museum
He took an early astronomy photograph, of the sun, in that year, 1842, but the plate revealed little detail due to overexposure (solarisation). His colleague Hippolyte Fizeau, working with the physicist Jean Bernard Léon Foucault made the first plate showing sunspots in 1844. His studio soon became a major meeting place and centre of innovation in daguerreotype photography. He worked with Fizeau and Marc Antoine Gaudin, with whom he claimed he could make images in a tenth of a second, which was exceptional for that time. The first plate photographs were tried out using Fizeau's sensitization methods. In his workshop there were panoramic daguerreotypes of the river Seine, preserved today in the Carnavalet Museum.