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[OM] Re: Zuiko 90/2.0 - sticky diaphragm

Subject: [OM] Re: Zuiko 90/2.0 - sticky diaphragm
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Tue, 19 Oct 2004 14:41:22 -0400
Fit can vary by very tiny amounts from body to body.  In your case, with 
that 4Ti, the arm in the body that stops the lens down is probably rubbing 
against the back of the lens mount trim, causing the hang up.

John Hermanson
Camtech Photo Services, Inc.
21 South Lane,
Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
_________________________________
----- Original Message ----- 
From: "Walt Wayman" <hiwayman@xxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Tuesday, October 19, 2004 2:33 PM
Subject: [OM] Re: Zuiko 90/2.0 - sticky diaphragm


> My 90/2 works just as it should on every body I have but one: the 
> champagne OM-4Ti.  For some reason, on this body, after the shutter 
> release is pressed, it occasionally locks everything up.  A twist against 
> the direction in which a lens is turned for mounting, which involves a 
> movement all but imperceptible, and the camera fires and takes a picture, 
> usually of my nose because of how I'm handling the gear to solve the 
> problem.  This happens a couple of times per 36-exp. roll.  I'm beginning 
> to think some of the later stuff may not be up to the quality standards of 
> the older gear.  That's part of my rationalization for not having a 3Ti.
>
> When are we having a Nose TOPE?
>
> Walt
>
> --
> "Anything more than 500 yards from
> the car just isn't photogenic." -- 
> Edward Weston
>
>
> -------------- Original message from Chris Barker : -------------- 
>
>>
>> Welcome Olli!
>>
>> I have a 90/2 that does not have this problem so I cannot help, really,
>> but I thought that I would offer you a welcome anyway :-)
>>
>> Chris
>>
>> On 19 Oct 2004, at 7:41, orava@xxxxxxxx wrote:
>>
>> >
>> >
>> > Hello!
>> >
>> > I have a kind of a problem with my zuiko 90/2.0 macro. If the aperture
>> > is set
>> > to 8-22 and when I push the stop-down button and then release it THE
>> > DIAPHGRAM
>> > DOES NOT FREELY OPEN. I meant that the diaphgram stays stopped down. I
>> > have to
>> > shake the camera or touch slightly the aperture ring to release the
>> > diaphgram
>> > again.
>> >
>> >
>> > Now I would like to ask:
>> > Is this a common problem (especially with 90/2.0)? Is it likely an
>> > expensive or
>> > a cheap repair to fix this problem? And btw, what could cause this
>> > stickiness?
>> > Is it a mechanical problem, or just dirt or have the lubricants
>> > wandered to a
>> > wrong place?
>> >
>> > Thanks!!
>> >
>> > Olli
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