Collapsible Summicron, wide-open on the M8. IR cut filter used.
Lower contrast means shadow details are better preserved. Great color correction means colors do not bleed across the pixels. Very little flare, used with a Heavystar vented hood.
This lens is near mint. I cleaned some slight haze from the surfaces on each side of the aperture blades myself.
Also: this is a 13xxxxxx lens. The coatings underwent changes from the earlier lenses, I have several. The color from this lens seems better than the earlier lenses. Stay away from the early Summicrons with SN under 105xxxx. They used Thorium Glass, and yellow. Great for collectors, not good for color.