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Re: [OM] Z. 50 1.8 on EP-1--- review

Subject: Re: [OM] Z. 50 1.8 on EP-1--- review
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Fri, 10 Jul 2009 11:37:31 -0400
Externally, yes, name ring appears to be the only difference.  Going 
from type 4 to MIJ type 5, glass is completely different.
___________________________________
John Hermanson  |   CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121  |  www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html


Carlos J. Santisteban wrote:
> Hi John, Chuck and all,
> 
> 
>> From: John Hermanson <omtech1@xxxxxxxxxxx>
>>
> 
> 
>> There are 5 types of 50 1.8
>>
>> 1 - Silver nosed, single coated
>> 2 - black filter ring, single coated, glass parts different than type 1.
>> 3 & 4 multicoated.   "Japan" on name ring.  Mostly identical inside
>> except type 4 has different lens group 2nd in from the rear. Name ring
>> will say "MC" (type 3) or not (Type 4).
>> 5 - Multicoated, "Made in Japan" on name ring, shares no optical parts
>> with type 3 or 4. Uses same name ring as type 4, Not marked MC.
>>
> 
> Thanks for the reminder. I wasn't aware of the type-4! So, the only external
> difference with the type (the 'miJ') is that type 4 is marked 'Japan' and
> type 5  'made in Japan' at the name ring, am I wrong?
> 
>  Chuck Norcutt wrote:
> 
> 
>>>> No, it's not the MIJ although they comment that it's multicoated so
>>> it's
>>>> later rather than earlier.  The MIJ name ring just says "ZUIKO" and
>>> not
>>>> "F.ZUIKO".  Also, on the MIJ, the focal length precedes the aperture
>>>> whereas this older lens lists the aperture first.
> <snip>
> 
>>>>> http://www.slrgear.com/reviews/showproduct.php/product/1279/cat/14
> 
> Thanks for your accurate and comprehensive description of Zuiko's
> different markings. But now I'm wondering if the lens shown in the
> above link is the _actual_ lens they used for the test, or just a
> generic picture? Anyway, as you already said, the presence or not of
> multicoating should have no effect at all on Chromatic Aberration.
> 
> Cheers,
-- 
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