October 25, 1824: Roger Fenton’s horse-drawn darkroom contained all he needed to coat, sensitize, expose and develop the 700 photographs he made, including the first-ever images of a battlefield.
Photograph by Roger Fenton/Library of Congress
 
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October 25, 1824: Roger Fenton’s horse-drawn darkroom contained all he needed to coat, sensitize, expose and develop the 700 photographs he made, including the first-ever images of a battlefield.