A black-enamelled Leica III with a screw mount for interchangeable lenses and a built-in coupled rangefinder with a magnifying eye-lens (1.5x). This was the first Leica model to have the range of speeds 1 second to 1/20 of a second and (on the fast speed dial) 1/20 to 1/500 of a second. The Leica (Leitz camera) was developed by Oskar Barnack (1879-1936) while head of the experimental department at the Leitz company in Germany. The 'Leica I' was released to the public in 1925.
© National Museum of Science & Media / Science & Society Picture Library