A co-researcher on another list posted this information in answer to my pondering when photography was "invented" and if I ever might realistically hope to ever find pix of more distant generations of ancestors. Thought some of you might also find it interesting and/or helpful. Happy Thanksgiving! Deb Fox Claussen 1829 daguerreotype, a single-image process, however--each exposure produced only one picture, incapable of reproduction. About 1829 "photogenic drawings" lacked the daguerreotype's sharp detail and brilliance but offered the great advantage that from one negative a large number of positive prints could be made. 1851 wet-collodion process, in which used a glass plate coated with collodion as a base for light-sensitive silver halides. In the mid-1850s the tintype, an inexpensive imitation of the daguerreotype 1871 a new era in photography began when an amateur English photographer, R.L. Maddox, produced a successful dry plate that retained its light-sensitivity after drying. In the 1880s the American George Eastman put flexible roll film on the market, and in 1889 he introduced the first Kodak camera with the slogan, "You push the button and we do the rest."