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Re: [OM] Zuiko 1.8 50mm lenses

Subject: Re: [OM] Zuiko 1.8 50mm lenses
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Sat, 03 Sep 2011 12:07:24 -0400
Yes, and since that response was from 6 years ago, my response now is 
much simpler. Just look for "made in japan" on the name ring.

___________________________________
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

On 8/31/2011 9:07 PM, Chuck Norcutt wrote:
> Sorry, this is the post I should have put here.  Also from John on
> October 2, 2000.  A bit more info
> -------------------------------------------------------------------------
> According to my parts lists, there are 5 different 1.8s.  The last three
> types (type 3,4 and 5) have plastic diaphragm rings&  focus rings.  If
> you look closely, you can see the  parting lines left by the molds.
> These 3 all have the 2 piece lens mount (compare to oldest SC type and
> you'll know what I mean by 2 piece).  Type 3 and 4 differ only in that
> there are 2 different  part numbers for the lens element group next to
> the rear element, other lens elements in type 3&  4 are interchangeable.
>    The other difference in type 3&  4 is that one name ring says MC, the
> other doesn't.
>
> Type 3&  4 started the practice of incorporating the front element,  and
> L2 into a sealed unit with the filter ring ((ZD3041).
> Type 5 has the same rear element as type 3&  4, but a totally different
> front group (w/filter ring) (ZJ1669).
> ------------------------------------------------------------------------
> But as Chris said the easiest way to recognize it is the "made in japan"
> on the name ring in front.  Often referred to here as the MIJ lens.
>
> Chuck Norcutt
>
>
> On 8/31/2011 9:01 PM, Chuck Norcutt wrote:
>>      From John Hermanson on June 7, 2005 from a discussion that was actually
>> about multi-coating
>> ----------------------------------------------------------------------
>> As I recall, the fast wide angles (21/2, 24/2, 28/2, 35/2) were always
>> MC. Type 1&   2 of 50/1.8 were SC, The last 3 versions of the 50/1.8
>> (type 3, 4, 5) were MC.  Type 3&   4 shared all the same parts except
>> element group 2nd from the rear. Type 3 would have MC on the front name
>> ring.  Type 4&   5 were MC without any MC marking.  Reflections in the
>> front element of MC lenses would be a purplish green in color.
>> ----------------------------------------------------------------------
>> I'm pressing my recall ability here but I think #5 was considered the
>> best but it also supposedly can be subject to sticky diaphragm but the
>> lens is assembled with thread locker and may be extremely difficult to
>> disassemble for cleaning.  I have one and it works fine.
>>
>> Chuck Norcutt
>>
>>
>> On 8/31/2011 7:29 PM, deebel wrote:
>>> Can someone remind me of the variations of this lens produced over the
>>> production period and whether any were particularly sought after?
>>>
>>> Thanks
>>>
>>> Dave
>>>
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