This performance level has nw extended over the outer zones, only the corners lagging quite severely. There is no curvature of field, hardly any vignetting and no chromatic aberrations to speak of. The outlines, fine detail and very fine detail are clearly visible with good sharp outlines and a fine micro contrast. Extremely fine detail is on the soft side. The outer zones still show astigmatism and in the extreme corners only fine detail is visible.
Flare is well suppressed, as is chromatic aberration and curvature of field.
The Summicron-M new. At full aperture a high contrast image is rendered with very crisp rendition of extremely fine details from center to the very corners. Astigmatism is gone except in the far zones. Exceedingly fine detail is now visible with good micro contrast. Flare is very well suppressed and all other aberrations can be neglected.