Leica Apo-Summicron-M 75 mm f/2.0 Asph
Our tests of M system lenses we started with two classic instruments– a Summicron, a 2/50 and a Summicron 2/28 - which, attached to a full frame rangefinder, are respectively a standard and a wide angle device.
sensational build quality; excellent image quality in the centre of the field of view starting right from the maximum relative aperture; very low chromatic aberration; negligible distortion; slight coma; well-corrected astigmatism; sensibly low vignetting which disappears completely on slight...
too „soft" at the edge of the frame by f/2.0 –f/2.8; very high price