I have an interesting work in process
I found a soligor 135mm Macro lens with jambed and bent aperture blades, plus a complete bellows and set of miranda extension tubes in a second hand shop for $25.
It took a while to sort out the aperture blades, and I had to rebuild and modify the diaphram, but the lens is now back together and functional.
the question is, the camera mount on the back of the bellows accepts a breach lock similar to cannon. I have found with the extension tubes a breach lock to miranda thread adaptor, but the thread is larger than M42. I was wondering if any one knew of a mirada to M42 adaptor .
I can, if I have to, cut the threads off and attach a flanged K mount adaptor but before I do this, I thought I would put the question out there for a response