Hey Its MightyMike, good to see all is well, i looked at it closely but never took it apart, i assume a spring is disconnected or broken or a linkage has disconnected... if you are good at this stuff go for it, otherwise enjoy it as it is

Hi Mike,

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.

Thanks for the heads up,

Karl