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What isn’t clear to anyone in attendance is that this a camera that will change photography forever.

This moment had been a long time in the making.

The Leica I camera with 50mm f/3.5 lens attached, on a grey surface with dark background

The Leica I (Type A) with Elmar 50mm f/3.5 lens, photographed by the Smithsonian National Museum of American History

The idea of the ‘decisive moment’ could equally be applied to the camera’s development.

That risk was to mass-produce the Leica I the first readily available 35mm Leica camera and it paid off.

The Leica I made photography a regular part of everyday life for more people.

First-ever poster for the Leica I camera, from March 1925

The very first advert for the Leica I, ahead of its debut at the Leipzig Spring Fair in 1925.(Image credit: Leica)

Its impact was significant at the time, and its influence is still felt today.

Our readers are certainly fans of full-frame.

But what about camera design?

A poster from 1925 illustrating a Leica I camera teardown

A Leica I teardown(Image credit: Leica)

On the one hand, the Leica company of today feels like a far cry from those early days.

Why try and blend in with the DSLR / mirrorless camera crowd?

Like most people, however, I’ll probably never get to call a Leica camera my own.

Screenshot of WhatsApp poll about sensor sizes, with full-frame receiving the most votes by a huge margin

The people have spoken – full-frame is the most popular sensor size in 2025

Leica I camera with brown leather finish, orange / yellow background with radar graphic

The Leica I, in brown. Image supplied by Leica.