MIR-20M 20mm f/3,5 Wide Angle Soviet Russian SLR lens M42 mount

The lens produces a very sharp image. Distortion is barely noticeable. 
The lens has very, very small short focus distance. Only 18 cm. It is possible to photograph small objects without any problems. In this case, the lens bokeh is very peculiar.
Mir-20M 20mm f/3.5 is a wide-angle coated lens, manufactured by the KMZ. The Mir -20M version was designed for SLR cameras with  M42 screw mount via a changeable rear part 

The resolution according to the technical specifications (center/edge):  50/30 lpmm;
Angle of  view: 96°;
Focal length - 20mm
Minimum Aperture - 16
Maximum Aperture - 3,5
Mount - M42
Lens has button- device for automatic or mechanical drive of the apperture.
KMZ plants (1984) 
S/n 842304

Condition: Excellent condition. With clean optics & focus working through the full range. Optics are clean with no fungus. The aperture is working correctly, 

Happy bidding !