I met a photographer who had a 150/2.8 Xenotar cammed to his Technika, and he was doing wonderful full-length, short DOF portraits, handheld on Tri-X. They had a beautiful look, I think he stopped down to f/5.6 or /8 for handheld work, and still had a decent margin of error and bokeh.
A pretty sweet set-up. Last I checked, nice 150/2.8 Xenos were in the $7-900 range on ebay.
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