Mamiya 645 110mm f/2.8: Removing Moly Paste from the Focus Helicoid
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Servicing a Mamiya 110mm f/2.8 lens for 645.
Lens came in with focus rough and erratic. On disassembly, the focus helix was found to be lubricated with a moly paste. Not good. All traces of the old lubrication needed to be removed from the fine threads in the mount base (seen at lower left in photo), the inner helical fine and course threads (bright aluminum part seen in bottom center of photo) and the course threads on the main lens body (seen in upper right of photo).
Finally, after all is reassembled, infinity focus needs to be reset (the lens is show resting in a focus adjustment fixture)
