stan_wagter

Thank you Orsetto, great to have such a detailed reply. Yes, I already lost a ball inicator !! see image... What I still don't understand is the process of unsreer ther rear element. You mention this: 'the shutter barrel completely detaches from the focus helicoid after you unscrew the rear element and remove a retaining ring securing the shutter barrel to the helicoid.'In order to enscrew the rear element, I first have to remove the focusunit. as far as I can tell. I put in some extra images:

Hi all, I have to replace the 'Mamiya Diaphragm Aperture Control Lever Knob'...yes, on ebay sombody is selling it, due to broken attachment. Althought the front part of the lens unscrews easy form the sutter, I can't get tthe shutter fro the rear end, and that's (I hope) where i have to be to open up the shutter. Any experience here? Can you just enscrew it, or do I have to detach the focus mechanisme?