I'm not sure how these items would be adjusted, but positioning of the
flip-up mirror, focusing screen and pentaprism all affect focusing accuracy.
I've read articles about this from other photographers more technicially
proficient than I. Makes sense. Perhaps shims or other methods are used to
make these adjustments. We know that the position of the flip-up mirror in
the down position is critical to focusing. What if the material that pads
the mirror on the return trip shrinks with age? Might result in incremental
changes in focusing accuracy.
As a former target shooter I do know there are lots of tricks for improving
accuracy in firearms that no manufacturer would divulge or approve of.
Lex
From: "Dirk Wright" <wright@xxxxxxxxxxxx>
>John, wouldn't pentaprism replacement be a pro job, since it affects
>focusing accuracy? It doesn't sound like a drop-in job.
>
>Lex
I didn't see any way of adjusting the prism when I had mine apart, so I
would assume that you could reasonably just swap a good one for a bad
one.
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