here s a teardown of a leica m camera /

There are approximately 1200 moving parts inside a Leica M rangefinder. In this 3.5-minute video, Tamarkin Camera in Chicago disassembles a Leica M give indicate what goes on inside the famous red dot cameras. Still frame from video by Tamarkin Camera. You can find more of Tamarkin Camera’s videos on its YouTube channel.

Source: google.com