The lens is quite heavy for it's size. I measured with the hood+ring 800 grams.
Back focus is long enough, so it can be used in DSLR and reach infinity, which is surprised me. Generally 70mm projection lens cannot achieved infinity in DSLR.
There's glowing on focused object, remind me of Trioplan 100 and Leitz Hektor 100/2,5, best for portrait I think.
Some purple fringing on high contrast object.
I'm pleased with the bokeh.
All with NEX5