That's a good point too. According to things I've read, photographic
'infinity' is 600-900X the focal length. With a 50mm lens, that would
translate to anywhere from 98-147' to qualify for infinity.
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
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----- Original Message -----
From: "Charles Sdunek" <csdunek@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Monday, December 06, 2004 5:44 PM
Subject: [OM] Re: Infinity Focus Alignment
> 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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