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Re: [OM] Two versions of 24/2?

Subject: Re: [OM] Two versions of 24/2?
From: Dawid Loubser <dawidl@xxxxxxxxxxx>
Date: Thu, 1 Jul 2010 00:30:30 +0200
My silver-nosed copy of the 24/2 is absolutely ancient, with a low- 
looking
serial number to boot (and dates from the time before the date codes  
were added
to the lenses).

I am still convinced that this early version used some of the fabled
"radioactive glass" like the early-version 55mm f/1.2, as mine was  
very yellow
when I bought it, and UV/Sunlight treatment cleared it up nicely. I  
don't
have a Geiger counter though :-)

Since Olympus changed a "lowly" lens like the 50/1.8 so many times in  
terms
of construction and optical formulation, it' likely that they might have
done the same to an exotic like the 24/2, especially since this was
one of Maitani's favourite two OM lenses.

He would not have been able to sleep if it wasn't "perfect", I am  
sure :-)

Dawid


On 30 Jun 2010, at 8:10 PM, Chuck Norcutt wrote:

> I chanced to look carefully at the parts drawings of the OM 24/2
> recently and was surprised to see that there were significant  
> changes to
> several lens elements and related parts labeled the "improved parts
> table"  <http://olympus.dementia.org/Hardware/PDFs/24mm_f2.0.pdf>
> But I never recall hearing about there being two versions of the 24/2
> nor what serial number ranges might be involved.
>
> Gary Reese's tests of the 24/2 indicated "pronounced waveform"
> distortion in his first test sample and "moderate waverform" in what  
> was
> presumably a second sample (although that's not explicitly stated as  
> it
> is on other lenses).  Is it possible the "improved parts" were to
> correct that distortion?
>
> Chuck Norcutt


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