Originally posted by 6BQ5
First issue comes from the body mating surface. It is very small.
Second issue comes from an inability to achieve infinity focus.
The third issue comes into play when I try taking a picture.
This is my Mir 1 - an early version, M39 (with adapter to M42)
Issue 1: yeah this is a nuisance. Aditionally, my K-r has exposure compensation issues when using AV mode. One way of trying to get around those is to make a contact with aluminium foil (on the normal non conducting black mounts). Since this mount doesn't cover the contacts, there is no possibility of a connection nor of using tricks like foil.
My lens doesn't have infinity focus problem - or rather if it has it focuses
past infinity. See my
Mir relubing guide for another comment and perhaps a bit of insight on this...
I am a bit mystified by your mirror hitting issues, I don't see any cause for that on my example. If yours is a later example with an auto pin protruding from the back that would be prime culprit for me...