thanks for info.
i bought this lens because of it's reputed sharpness and it was clean and felt solid enough in my hands to be uses as a hand to hand weapon in a bar fight.Bokeh was not the consideration for a change. I saw 'made in west germany' and that sealed the deal.
It is a nice solid fit on my SL 35 ,and i have an adapter coming to use it on the A7.I think i will give it a workout with a roll of Velvia or ektar or an Agfachrome i got stashed somewhere