Richard Leach Maddox,
Richard Leach Maddox, born in 1816 was an English photographer and physician who invented lightweight gelatin negative plates for photography, referred to as dry gelatin photographic emulsion.
André-Adolphe-Eugène Disdéri
André-Adolphe-Eugène Disdéri was a French photographer who gained his fame by being credited with the introduction of the carte de visite. Later, Disdéri patented the system in which he uses a camera with multiple lenses that can photograph eight different poses on one large negative. Disdéri also invented the twin-lens reflex camera.
Eadweard James Muybridge
Born in 1830 in England. In his early years he was a successful bookseller, however after severe head injuries from a runaway stagecoach accident his life lead him in a new direction. While recuperating, he took up a new field of professional photography and became very successful at it. Still today, Muybridge is best known for his pioneering work in photographic studies of motion and in motion-picture projection. However, it was his large photographs of Yosemite Valley, California that made him world famous.