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Re: [OM] Separated Zuiko 250/2, was: Inside the Zuiko 300mm F4.5

Subject: Re: [OM] Separated Zuiko 250/2, was: Inside the Zuiko 300mm F4.5
From: iwert bernakiewicz <zuikooh@xxxxxxxxx>
Date: Wed, 11 Nov 2009 14:52:45 +0100
Hello John,

I was just thinking, might it be possible that one of the elements is
mounted the wrong way?
If I look at the section only the fourth from the back could be
reversed, if it is not symmetrical,
the others seem one way only...

Iwert

2009/11/11 John Hermanson <omtech1@xxxxxxxxxxx>:
> Yeah, extremely complicated, I'm letting the owner decide what to do.
> At this point I don't want to be involved.  I recement OM eyepiece
> lenses using Loctite clear glass glue (cures in sunlight) but that's a
> tiny surface, there's always a way out if it goes wrong.   Just
> completing the separation on a partially separated 3, 4, 5, or 6"
> diameter element is a nightmare scenario.  looking through the lens, you
> can't even see which element is bad, IF one is bad, who knows.  No
> thanks. :-0
> ___________________________________
> 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
>
>
> Chuck Norcutt wrote:
>> I posted a note to the Yahoo camera repair group on re-cementing
>> elements and got this response
>> -----------------------------------------------------------------
>> Yes, go here:
>>
>> <http://www.focalpointlens.com/fp_services.html#lens_separation>
>>
>> If Zuiko used balsam, it should be repairable.
>>
>> If Zuiko used UV epoxy, well, it may be hard to separate the lens
>> doublet.  Maybe even impossible.
>>
>> Good luck
>>
>> Vick
>>
>> To: camera-fix@xxxxxxxxxxxxxxx
>> From: chucknorcutt@xxxxxxxxxxxxxxxx
>> Date: Tue, 10 Nov 2009 12:03:25 -0500
>> Subject: [camera-fix] Source for cleaning and re-cementing separated
>> elements?
>> ------------------------------------------------------------------
>>
>> Chuck Norcutt
>>
>>
>>
>> Chuck Norcutt wrote:
>>> But there are folks who specialize in cleaning and re-cementing
>>> separated elements.  Given the value of the 250/2 it may be worth
>>> considering.
>>>
>>> Chuck Norcutt
>>>
>>>
>>> John Hermanson wrote:
>>>> Ouch. I'm happy to say that all the 300s I've come in contact with have
>>>> not been glued.  Perhaps the ones I say at Olympus trying the patience
>>>> of the techs were an anomaly.  Speaking of lens defects....that reminds
>>>> me that about a month ago, a customer in Norway sent me his 250 f2 due
>>>> to sticky focus ring and poor focus issues.  I put the lens on my test
>>>> OM-2 and tried to focus out the back window.  Focusing wide open on a
>>>> reasonably flat plane (a row of flat bushes) only a central circle was
>>>> sharp.  The worlds most expensive "lens baby" ?   The only defect I can
>>>> come up with is that it has a separated element which makes the lens
>>>> "beyond repair" (no parts available, and the elements were super
>>>> expensive when they were available).
>>>>
>>>>
>>>> ___________________________________
>>>> 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
>>>>
>>>>
>>>> Chuck Norcutt wrote:
>>>>> Oh, oh!  I forgot that this is the lens apparently assembled with super
>>>>> glue.
>>>>>
>>>>> Chuck Norcutt
>>>>>
>>>>>
>>>>> John Hermanson wrote:
>>>>>> 300 4.5 with oil on the blades.  A fun job! :-)
>>>>>> ___________________________________
>>>>>> 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 all,
>>>>>>>
>>>>>>> An unusual view of my F.Zuiko 300mm F4.5: <
>>>>>>> http://www.flickr.com/photos/zuiko21/4085731295/>
>>>>>>>
>>>>>>> Taken with my new Lumix GF-1 (plus 20mm F1.7) -- review coming soon!
>>>>>>>
>>>>>>> The previous picture in my gallery is the only other one taken with this
>>>>>>> little camera, buy maybe not up to anyone's taste. Lots more (either 
>>>>>>> film or
>>>>>>> digital) will be uploaded shortly -- I hope!
>>>>>>>
>>>>>>> Cheers,
> --
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>
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