Mamiya 645 Super/Pro: Gallery of Broken Mirror Stops
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Gallery of broken Mamiya 645 Super/Pro mirror stops. An important word about this part:
The mirror stop on the Mamiya 645 Super/Pro is made of a plastic material and at this point in time, they are in either one of two states: broken or about to break. Many users of these cameras don’t realize the stop is broken until too late. When the stop breaks, the small part with the adjusting screw or the spring will at some point get loose and I see them often stuck in the shutter mechanism causing problems. This results in a more costly repair.
A broken stop may not be evident if you look at it. A broken stop will usually be stuck in the down position against the bottom of the mirror box. As you can see from the photos in my post, sometimes a broken stop will be lifted upwards when the mirror is locked up and often the spring will be loose as you can see in the photo. If you have a Mamiya 645 Super or Pro, easiest way to check if the stop is broken is to focus at an infinity object and if you can’t quite get to infinity it is very likely you have a broken mirror stop and you should have it taken care of before it breaks apart and causes further damage.
