Color Skopar Voigtlander 21mm f / 4.0 lens is definitely recommended. Thanks to a very good image quality already earned cult status. Very sharp contrast image in conjunction with the prospect of 21mm lens made that this is one of the most interesting glasses system built by Voigtlander.
Fixing: Leica M (Voigtlander VM)
Aperture: F4 , 0 (min F22)
number of diaphragm blades: 10m
Inimalna distance: 0.5 m
angle: 91 degrees
lens construction 8 elements in 6 groups