Hi Mike
If you ever come across a reasonably priced M42 to K mount, please let me know. prefer pentax if possible. want to pick up some screw mounts to sell, but it is hard to test them out without an adapter
hope you're doing good. Oh, while I'm at it, your macro shots with your special light are something else ! They are really fine and technical pictures, I like them.
Just so you replace me, I'm the guy who bought your vivitar 135mm and pentax da 50-200mm lens. I don't have any problem with the lenses, rest assure.
I was just wondering if you yourself attempted to repair the stocked aperture on the Vivitar lens ? I was thinking maybe I could have some fun and try it but I don't want to waste to much time on it if you already tried it.