Xpost from other bokeh thread ...
I "Franken-lens-ed" another one Sunday afternoon.
I purchased a Tele-Universar 200/4.5 at the Poitiers swap for its 13-blade aperture and 330° throw. I dissembled it since the glass was not that great and used the helicoid bottom section with a "Will Wetzlar Magninon 100/2.8" projector lens inserted in it. Good working focal distance for me and here are the first test samples upon the withering flowers of the front yard.
Shot on the
K-5 "wide open" since there's no aperture ... and that 13-blade aperture is for another Franken-lens project ... ha!