Long time ago i bought a black M42-to-PK ring, with a flange that allows to have a working diaphragm with "auto" M42 lenses without the A/M switch.
I found that the adapter had tight tolerances, and mounted/unmounted without the problems that often plague chinese adapter rings.
The only slight inconvenience was that the marks were not at 12 o'clock.
I've used it extensively with a 100mm Pentacon that has no switch.
I don't have that ring with me, so today i decided to try to find something similar on Ebay, and to my surprise i found that flanged adapters are rare, and quite expensive.
I found an identical one from Lithuania, or a similar Kipon adapter, not anodized black but probably made of plated brass.
I attach a picture of the latter.
Both solutions are $30 or more, much more expensive than a cheap chinese ring, and almost as expensive as a 2nd hand Pentax original ring.
I have two adapters with me, one Pentax and one chinese knock-off, but i need a flanged one.
Does anybody know about a cheap flanged adapter?
Thanks
Paolo