Early daguerreotype by Alphonse Giroux and Company. View of Paris looking west along the Seine with the Pont Neuf in the foreground. The label reads: 'Les ponts et la galerie du Louvre a 5hr 15. Soleil couchant'. (The bridges and the Louvre Gallery at 5.15 pm with the sun setting). Daguerreotypes were images produced as direct positives on sensitised metal plates. The process involved a long exposure and only produced one image. Daguerreotype photography was one of two pioneering photographic processes announced in 1839, along with William Henry Fox Talbot's (1800-1877) calotype process.
© National Museum of Science & Media / Science & Society Picture Library