Beautiful imaging, with highlight flare at f1.4 , portraits are gorgeous, stopped down this lens is very sharp. The updated (1962-1994) Summilux has improved imaging at f1.4, eliminated the flare and the character at that aperture, at f5.6 the lens doesn’t achieve the sharpness of the 1959 Summilux. This is one of the most disregarded lenses in the Leica system and prices remain relatively modest by Leica standards. Build quality is the peak of Leica manufacturing, M3 era, solid and heavy feel. If you are considering the Summarit 50mm f1.5 (1954-1960) purchase this lens, it has a similar optical formula without the soft glass, and build quality is a quantum leap forward.