Mamiya 645 Super: Setting Mirror Angle After Stop Replacement
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
A broken mirror stop is a common repair on the Mamiya 645 Super, Pro and Pro TL. After replacing the stop, the mirror needs to be set to a 45 degree angle before focus can be checked/adjusted.
Shown here is how I adjust the mirror: with a 45 degree fixture and autocollimator. When the star target is centered, the mirror will be at the correct angle.
