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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