Acquired another
Photax Paragon 300mm f5 (couldn't resist the price). Its a classic hefty old M42 lens. Mint condition, but optically no better than the last one! Lumix G1 (just easier to work with M42 lenses on the lumix than on the Pentax: no exposure problems, magnified focus assist is very accurate either on the screen of through the evf, but lens issues are magnified a bit more by the 2x crop factor):
This was the best pic. f8 or 11 (f stop not recorded obviously)
And this was the best wide open pic, most were not that great TBH, and I had to work in pp to ameliorate the PF on the black-white feather line.
Fair results for a "coffee and donut" lens IMO...
My other bargain buy was a sigma 400mm. But thats probably the worst case of fungus I've had! Clean up project , I'll keep you posted.