Oskar Barnack
German optical engineer (1879–1936)
Oskar Barnack (Nuthe-Urstromtal, Brandenburg, 1 November 1879 – Bad Nauheim, Hesse, 16 January 1936) was a German inventor and photographer who built, in 1913, what would later become the first commercially successful 35mm still-camera, subsequently called Ur-Leica at Ernst Leitz Optische Werke (the Leitz factory) in Wetzlar.
Life and career
Barnack was an engineer at the Leitz company and suffered from asthma, so he proposed reducing the size and weight of cameras in order to be able to take photographs in his travels. In 1924 the camera was named Leica, an acronym obtained from Leitz Camera. It was released at the Leipzig Fair in 1925.
Between 1913 and 1914, Barnack adapted 35 mm cinematic film for still-camera use with a larger negative than other 35mm cameras. The pronged-film rollers holding the perforated film allowed more precision than typical paper-backed roll film. His design was revolutionary because he transported the film horizontally, allowing an extended frame size to 24×36 mm with a 2:3 aspect ratio, instead of the 18x24 mm of cameras that carried the film vertically. Negatives in this small format could be enlarged to obtain sharper positive images. For this to be effective, the camera also needed a high-quality lens capable of producing the larger format film's quality.
Barnack tried various types of lenses, trying to find the best quality images.
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The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated Mar 1, 2026. The linked authority identifier is Q61109. VIAF identifies the subject as 45191303. The Library of Congress control number is no2010145995. 3 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1879, 1936, 1913 and 1924.
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This entry incorporates text from “Oskar Barnack” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.