Mamiya 7 210mm Lens: Service and Lack of Rangefinder Coupling
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Servicing a Mamiya 7 210mm lens.
The 210mm lens is a bit of an oddball in that it does not rangefinder couple to the camera body. So, you have to estimate your focus distance. Maybe that’s why this is not that popular of a lens. Mamiya did offer rangefinder coupling on the 250mm lens used on the Mamiya Universal system, but maybe because of the tighter specs on the Mamiya 7 rangefinder the engineers though that coupling of this lens would not be accurate enough for the system? In any case, the rangefinder coupling is not of any consequence with this example as it is being modified for use on a digital camera.
As you can see in the second photo, there is no rangefinder coupling mechanism in the lens. You might think this would make the lens a bit simpler to service but not really as you are working down a long tube and there were special construction methods used on this lens.
