Daguerreotype
It is said that Daguerre has found the means to collect, on a plate prepared by him, the image produced by the camera obscura, in such a way that a portrait, a landscape, or any view, projected upon this plate by the ordinary camera obscura, leaves an imprint in light and shade there, and thus presents the most perfect of all drawings ... a preparation put over this image preserves it for an indefinite time ... the physical sciences have perhaps never presented a marvel comparable to this one.
A further clue to fixing the date of invention of the process is that when the Paris correspondent of the London periodical "The Athenaeum" reported the public announcement of the daguerreotype in 1839, he mentioned that the daguerreotypes now being produced were of considerably better quality than the ones he had seen "four years earlier".
Photography in Denmark
Christian Tuxen Falbe, a Danish marine officer, was in Paris in January 1839 on behalf of Crown Prince Frederik when Louis Daguerre revealed the art of daguerreotyping. Falbe informed the Crown Prince of a visit to Daguerre where he had seen some of the very earliest daguerreotypes, explaining how impressed he had been by the new process and how important he thought it would be for art and science in Denmark. Shortly afterwards, he returned to Copenhagen with a camera and a couple of his own daguerreotypes for the Crown Prince who, believing them to be of scientific importance, deposited them with Hans Christian Ørsted, one of Denmark's most prominent scientists. As a result of Ørsted's own interest in photography, the new art took on rapidly: the daguerreotypist Mads Alstrup (1809–76) opened Copenhagen's first photographic studio in 1842; and by 1850 there were over a hundred studios in Copenhagen and many more in the provinces.