Rangefinder optics hasn't recently appeared on the main page of portals dealing with tests of photographic equipment. The reason for this was simple. Good tests of these lenses could only have been conducted on analogue cameras.
very high build quality; excellent image quality at the center of the field of view; after stopping down; good image quality at the center of the frame; small chromatic aberration; slight distortion; very good work against bright the light; high transmission
distinct coma; large vignetting around the maximum aperture