I haven't figured out anyway around this situation, so what I'm thinking of doing is drilling through the top of the lens release button (it's the part circled in GREEN in the diagram in Post #6 above). The top is thin metal and I'm hoping that I can then put & push a small screwdriver through the opening to release the lens. Perhaps the back end of the release button is broken or bent.
I have nothing to lose at this point. Any thoughts before I jump in???
Thanks for the suggestion. If my drilling out the release button itself proves worthless, I might try that, but cutting into that cramped area appears difficult.
I've seen that once before, sent it to a shop years ago & was told "no way"
to get to the linkage.
I'm surprised the lens even stops down. is it more or less accurate?
The lens works fine in all respects. The catch/release lever is completely separate from all other lens functions. It's simply a tab that fits into a slot on the rear of the lens mount -- and is supposed to move up and out of the way when the release button is pressed. The lens is correctly attached to the camera, and the whole setup works correctly, as is. Too bad a no-guarantee surgery appears to be the only option.