Asahi Pentax Variable Close Up Ring for M42 Mount -Clean in Case-
Here is a useful Pentax accessory, a variable close up ring for m42 mount lenses. It gives you more control over the close focusing.
This would be excellent for adapting to a mirrorless camera, and would allow you to shoot wide angle macro at a fraction of the cost.
It is in excellent condition with very light wear and works perfectly. The focus is slightly stiff but is not hard to turn. The mount is in excellent condition.
It comes in the nice leather carrying case.