"I Hereby Decide: We Will Take the Risk"
Every revolution starts with someone who's just tired of the way things work. In 1913, that someone was Oskar Barnack, a master mechanic at the Ernst Leitz optical works in Wetzlar, Germany. An asthmatic who found the era's heavy plate cameras physically unbearable, Barnack did something that would reshape a century of visual culture: he built a camera small enough to hold in one hand.
The prototype — now revered as the Ur-Leica — adapted 35mm cinema film but rotated it horizontally, doubling the frame from 18×24mm to 24×36mm. That 2:3 aspect ratio? It's still the "full-frame" standard in every professional camera made today. Barnack didn't just build a camera. He invented a format.
World War I shelved the project for a decade. When Ernst Leitz II finally confronted the decision in 1924 — in a Weimar Republic economy where risk could mean ruin — his response became the stuff of corporate legend: "I hereby decide: we will take the risk." The Leica I debuted at the Leipzig Spring Fair in 1925 and sold out immediately. Photography was no longer a tripod-bound, darkroom-adjacent ritual. It was mobile. Spontaneous. Alive.
The format that ate the world: Barnack's 24×36mm frame didn't just define Leica — it defined photography. Every "full-frame" sensor in every Canon, Nikon, and Sony today traces its dimensions directly to an asthmatic mechanic's prototype from 1913.