It was discovered in mainly by Joseph Nicéphore Niépce, Louis Jacques Mandé Daguerre, and William Henry Fox Talbot. All three of these men made a contribution towards the discovery and accomplishment to the overall invention of photography.
Louis Daguerre refined Niepce's work during the 1830s resulting in the creation of the daguerreotype which only needed a few minutes of exposure and produced a sharp, clear image. The details of this process were released in 1839 and this date is considered to be the start of photography as a viable medium.
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