Mamiya 645AF 80mm AF Lens: Broken Aperture Ring Gear
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Servicing a Mamiya 80mm AF lens for 645AF cameras. Had to replace a broken plastic aperture ring gear. The diaphragm in this lens is electrically controlled by the camera. Repairing the AF lenses (or any of the AF cameras, backs, or lenses) requires special Mamiya supplied equipment to test and actuate the lens. The final photo shows the lens connected to a jig for checking lens operation with a 1990’s laptop!
Interesting that Mamiya used the same FPC board on several of these lenses and just used a jumper system to designate the lens that is was installed in. These jumpers can be seen in photo four.
My service these days is very limited with the Mamiya AF system due to a very small selection of parts that I have in stock.
