Mamiya 645 80mm f/1.9 Lens: Repairing a Lens in Two Pieces
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Mamiya 80mm f/1.9 lens for 645. This lens arrived in two pieces. Not sure how this happened but after some repair to the helical guides, complete cleaning of the helical threads and then reassembly, the lens is working fine. It is a little easier to service these when they have not come apart as then I can scribe index marks for reassembly. The last photo shows the lens being adjusted for infinity focus on a special 645 lens fixture.
Oddly enough, I received two of these exact same lenses recently that arrived in two pieces. Unfortunately, one of them could not be saved as the focus helix had impact damage that was not fixable.
