Despite a variety of technical innovations, the first M with an integrated TTL light meter is met with relatively weak demand. Its large body is quickly blamed as the main reason. Thanks to the development of the M4-2 by Ernst Leitz Canada, Leica was quickly able to build on its previous success.
Ernst Leitz III, who took the reins in Wetzlar in 1953, is faced with ever-increasing manufacturing costs from the start. To remain competitive while maintaining the product quality, factories are set up in Canada and Portugal. This move is a successful one. Ernst Leitz Canada would go on to be a long-standing source of lens and camera innovations for many years, while the factory in Portugal embodies the passion and precision of the Leica Family from 1973 to the present day.

