Leica 50mm f2.0 Summicron Rigid-M #11118 Specificaties Production era - 1951-1969 < 253,314 lenses per list below Variants - Collapsible, rigid, rigid Dual Range (DR); Compur shutter (CS), chrome and black; duel lever (s/n 920022) Lens mount - Leica Screw-thread and M-bayonet Compatibility - DR version cannot be used on M8 or M9 cameras and the collapsible type can only be used fully extended. Number of lenses /groups - 7 /4 F stop range - f/2-f/16 Closest focusing distance - 1 m Diaphragm setti ...