Leica Summicron 50mm f/2

The Summicron-M 50mm f/2 is Leica's long-running standard lens for M-mount rangefinders, first introduced in 1953 and refined through five major versions. The current design, in production since 1994, uses a six-element double-Gauss formula that delivers sharp, neutral rendering with minimal distortion. It takes 39mm filters and weighs 242g, making it one of the more compact options in Leica's M lens lineup.