Leica M Lenses with bayonet mount. To fit Leica rangefinder film and Leica M digital cameras. Leica made a range of lenses from wide angle 21mm all the way to tele lenses 135mm. Some of the rare ones are Noctilux, Summarex and Summilux. The standard lenses are the 35mm Summicron or Elmarit or 50mm Summicron. The Telyt 135mm is also available in Apo version. Many other lenses available.