The Leica M2 is a 35 mm rangefinder camera by Ernst Leitz GmbH of Wetzlar, Germany, introduced in 1957.

Notably, the frame counter of the M2 was composed of a disk plate beneath the film advance lever that had to be manually reset to zero after reloading.

This system was close to that of the Leica III series, and unlike that of the M3, which is an independent frame counter, visible through a window in the top plate, that automatically resets to zero when the film take-up spool is removed.

This made it better suited for photojournalists who favour shorter lenses or for spectacle-wearers using a 50mm lens who sometimes find it difficult to see the framelines on the M3.

The ground glass frameline illumination window of the M3 was replaced with a fresnel-type plastic lens.