Originally posted by D0ri I need to folow all the steps or just play a little with the pin and turn everything to it's place?
I don't know if it's worth it
At worst, you have a darn good SMC-M 50.
It actually isn't that difficult to fix that pin as originally designed. Disassemble it in a plastic bag to capture any unexpected spring-loaded parts launches and have a large magnet handy too. It may just be that there's crud or corrosion that needs to be scraped clean. If it's actually broken, you can probably jam the pin permanently in the extended position. But provide enough "give"
to ride over the bumps on the body plate.
Ultimately, if you'll only use the lens in the auto condition, just arrange to short the pin to the body by any feasible means. The auto/manual switch is only there for reverse compatibility with older bodies anyway. As a quick check, a very tiny piece/ball of aluminum foil carefully positioned to short the pins will confirm this "fix".
H2