Glad I could help. The red stuff is probably some sort of "loctite"
which in this case didn't do it's job. Hats off to you for taking care
of it. You have avoided a trip to a repair shop.
At Tamron, I've been certified to repair on the SP 17-50mm f2.8 VC,
70-200mm f2.8, and am training on the 70-300mm VC. Tamron will be
making lenses for the m4/3rd system, and Sony Nex cameras. BTW, the
70-200 is awesomely sharp and contrasty.
___________________________________
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 2/6/2012 10:56 AM, marc simon 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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