Yeah, I know. I think I'm going to pair it up with a small monopod I have even when I do get a good adapter. Coming from the world of rangefinders, I'm not used to that sort of thing being able to shoot a fast 50mm as low as 1/8th handheld.
I had a few thoughts (err... fantasies) about getting a custom made adapter to couple the lens to my rangefinders but the costs would be crazy. Even with the use of the lens' tripod mount, I think that it would still would be difficult to focus with the crappy adapter. It was such that if I turned the focussing ring (which was silky smooth BTW) one way the adapter would move about 5 or 6 mm the opposite direction in the mount. Lesson learnt - I won't buy el cheapo adapters again - just real Pentax ones.
I purchase the lens from Yuriy Davidenko of DVDTechnik in Kiev for around $275 USD. Great seller. When he says 'Excellent' - its more like 'Mint'. The only thing wrong with the lens was a bit of paint coming off on the threads of the m42 screw mount, which is expected. It also had an insignificant 2mm scratch near one of the screws on the aperture locking ring. It was touched up very nicely with some flat black paint. One probably would never notice it but when buying used lenses, I always check the screws for signs may indicate if the lens has been opened. It probably just went through a CLA because the glass was absolutely spotless (and its a 30 year-old lens) and it smelled a bit like gear oil. It arrived in Canada in under two weeks, which is just astounding for me. I once waited 3 months of a Jupiter-3 50/1,5 to arrive from Moscow.
I'm a big fan of optics made behind the iron curtain. Next up for me is either a Carl Zeiss Jena 20/2,8 Flektogon or a Carl Zeiss Jena 300/4 Sonnar, both made in the former East Germany. Hopefully, I can buy these from DVDTechnik again as he also has access to lenses from other former communist countries as well as the usual Soviet stuff.