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Re: [OM] trouble with my 50-200

Subject: Re: [OM] trouble with my 50-200
From: Chris Barker <ftog@xxxxxxxxxxxxxx>
Date: Mon, 6 Feb 2012 18:55:53 +0000
I love a simple solution.  Well done, John.

Chris

On 6 Feb 2012, at 18:36, Jez Cunningham wrote:

> Excellent - another medal for John!
> 
> On 06/02/2012, marc simon <marc.simon@xxxxxxxxx> wrote:
>> One million thanks John !
>> You are "The Man"...I was sure you'll have the solution:
>> in fact there are two small screws under the rubber: they were loose I
>> see a red deposit probably some locking glue...on the thread... in
>> turning the ring I discovered two small threaded holes on  two some
>> metallic pieces under the ring (with the zoom at half way...) some
>> "screwing later"...Bingo it works...and on the radio at the same time
>> Counting Crows singing Mr Jones and me...for one moment I translate it
>> in "Mr John and me"...:)
>> It's too cold here to go camping, but for sure I'm a happy camper !
>> For the record when the zoom is fully extended the two screws are in
>> line with the white dot of the rotating collar of the foot on the right
>> at 90° clockwise
>> regards
>> marc
>> bois-de-villers Belgium
>> 
>> 
>> Le 6/02/2012 12:48, John Hermanson a écrit :
>>> When zoomed all the way back, there is probably supposed to be a large
>>> screw head visible through a hole in the zoom ring (under the rubber).
>>> Screw head rides in a track inside the zoom ring. It is possible screw
>>> has come out of the track or come unscrewed from the zoom tubes. If
>>> unscrewed (or broken off) it would be rolling/rattling around. I have
>>> never worked on the Olympus but it is similar to Tamron 70-200.
>>> 
>>> ___________________________________
>>> 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 2/4/2012 2:43 PM, Wiliam Wagenaar wrote:
>>>> Sorry Moose,
>>>> 
>>>> I believe that focusing is 100% electronically, but zooming is
>>>> mechanical.
>>>> Even works when lens is disconnected from the body. What's wrong with the
>>>> lens? No idea!
>>>> 
>>>> Mechanical Wiliam
>>>> 
>>>> -----Original Message-----
>>>> From: Moose [mailto:olymoose@xxxxxxxxx]
>>>> Sent: zaterdag 4 februari 2012 19:21
>>>> To: Olympus Camera Discussion
>>>> Subject: Re: [OM] trouble with my 50-200
>>>> 
>>>> On 2/4/2012 7:06 AM, marc simon wrote:
>>>>> Hi, all,
>>>>> bad luck this morning at one moment my Zuiko ED 50-200 doesn't want to
>>>>> zoom anymore:it looks like there is something "non-functioning" in the
>>>>> linkage between the zoom ring and the optic. With some tweaking I could
>>>>> manually extend the lens, like a one-ring zoom, and when I look at the
>>>>> data the focal lens looks correct, and the autofocus still works...
>>>>> So it looks like some mechanical linkage is not functioning anymore.
>>>> I can't believe that is any mechanical function. Everything is
>>>> electrical.
>>>> There are a couple of other brands that
>>>> accommodate their old MF lenses with mechanical connections.
>>>> 
>>>> First thing to do is clean the contacts on lens and body.
>>>> 
>>>>> ... It was cold this morning, but the lens doesn't suffer any shock...
>>>> Perfect situation for a tiny bit of condensation to mess up a contact
>>>> that
>>>> was already a little dirty.
>>>> 
>>>> The Tamron lenses on my Canons very occasionally cease to AF properly,
>>>> busily and noisily hunting back and forth. Sounds
>>>> like something terrible has happened. If it hasn't happened for months,
>>>> it
>>>> often takes me a moment to remember what it
>>>> is. A quick wipe of contacts with my shirt or other piece of cloth puts
>>>> things right. Then I try to remember to do a
>>>> better job when back out of the field.
>>>> 
>>>> Cleanliness Is Next to Function Moose
>>>> 
>> --
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>> 
> -- 
> _________________________________________________________________
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> Themed Olympus Photo Exhibition: http://www.tope.nl/
> 

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