Sooo beautiful!! I'm a day a way from winning myself my first Carl Zeiss Jena 50 2.8 (1968 m32), i'm accustomed to the wide open 1.4 lenses but i was drawn to the sharpness this lens is said to have. i guess we'll see if it's still got that creammy creammmy bokeh!
You can't go wrong with any of those vintage Zeiss. The Jena 50 2.8 has a gorgeous bokeh.
I own a Flektogon 35 2.4 and it's a remarkable piece of glass too. Very sharp, even when wide open.