[OM] Infinity focus & focusing screens

[Donald Shedrick]

I recently bought the 35-70 f3.5-4.5 zoom.  I have
noticed that best infinity focus on distant objects
with the split image on the 1-13 focusing screen is at
slightly less than all the way to the infinity mark on
the lens (about at the left loop on the infinity
symbol).  I am using the varimagni finder in the
magnified position, and this is equally true for all
focal lengths.  However, when I use the fine matte
screen (1-8) it appears that the best focus is all the
way to infinity, again using the varimagni finder.  I
have redone this several times making sure the
focusing screens are well seated.  Which is the more
accurate indication of correct infinity focus?  By the
way, I do not notice this with any of my other
numerous Zuiko lenses.  Thanks for the help.


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