The old Wollensak enlarging and copy Velostigmats (and later Raptars) are hidden gems, with a lovely detailed bokeh, which can often be had for a “song” so to speak. This lens head was mounted in the focusing mechanism of an old M42 telephoto lens–professionally done–which I found for $100. This lens produces, to my eye, a very pleasant illustrative effect in out-of-focus areas.