Hi Neven,
I don't know. You'd have to check the type of bayonet fixture that the MZ uses, if it's a K mount. I've had this ring a long time, but the camera that I would have used with it died not long after I bought the ring and didn't get to use it,
. Back in the days of film too. Haven't bought a Pentax since.
I'll hold it for you 'til you let me know.