Very interesting photos which show the differences between lenses... The "swirling" bokeh of the Jupiter 3 is perfect! I am surprised by the "square" one of the Zenitar 2/50 (2nd photo). The results of the Jupiter 6 (180mm) seem fabulous...
Hi, I frequently use Russian and East German Zeiss M42 lenses on my Canon EOS and have had results almost indistinguishable from the Canon lens. Where else can you get a lens that will perform well at f:/2.8 for under £100? OK so manual focussing/stop down is needed but that is a minor inconvenience.