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[OM] Re: Infinity Focus Alignment

Subject: [OM] Re: Infinity Focus Alignment
From: Charles Sdunek <csdunek@xxxxxxxxxxx>
Date: Mon, 06 Dec 2004 17:44:51 -0500
Dean Tyler wrote:

>Dear Oly Gurus,
>
>I recently noticed that my lens focus just past infinity on both of my OM
>bodies (OM2n,OM2s).  I noticed that when the matte screen looks in focus I
>am just a little before my lenses stop at infinity.  It is more pronounced
>on one body that has been used for years.  The second body which focuses
>closer to infinity was CLAed by John in the Spring.  If I look through the
>viewfinder at a distant object the split screen doesn't line up.  If I back
>off the focus a tad, it does.  The same goes for the matte.
>
>First question:  Is this common?
>
>Second Question:  Does this mean that focusing on closer objects with the
>split screen it will be a little off also or does the focus accuracy get
>worse the further objects are from the lens?
>
>Third question: Assuming the lens are focusing correctly (which have been
>checked a local shop) where could the problem be (mount, mirror, screen, or
>all three) and is there a way to figure it out.
>
>Fourth question:  Should I just matte focus and forget about it?
>
>Dean
>
>  
>
I had thought the same thing was going on with my OM-2 and OM-2n, but 
what it ended up beings, is that "infinity" was farther away that I 
thought it was.  If I focused on something really far away, the stop was 
in the right place.

Charles

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