Leica 24mm f/3.8 Elmar-M Aspherical, Manual Focus (6-Bit Coded) Lens for M System - Black - U.S.A. Warranty Aperture Range: f/3.8-16 Click Stops & Half Values on Aperture Quivk Change Bayonet with 6-Bit Coding Minimun Focus Distance: 2.3' (0.7 m)