Sounds like a "combination problem" -- that particular TeleTube and that
particular OM-4 just aren't lining up properly. In this case, I suspect
that the arm for the aperture is slipping past the coupling ring in the
body.
You might be able to see a scratch mark on the tab of the plastic coupling
ring inside the front of the mount of the OM-4, where the metal arm in the
TeleTube is slipping over it. Or you might try holding the shutter open in
"B", looking through the back of the camera, and operating the aperture ring
of a lens attached to the TeleTube -- you can see the coupling ring turning
(if it is!) from the back.
There's a slim chance that the coupling ring will have to be replaced, but
more likely the arm in the TeleTube needs to be "adjusted" slightly. You'll
want to send both items together if you want it corrected.
>
> Hi,
>
> I have been using my recently aquired Telescopic Auto Tube with my OM-4
> successfully for some time now. At the weekend I happened to use them for
> the first time with my OM-4Ti, but the mechanism that tells the camera
what
> the aperture is selected on the lens did not work correctly.
>
> Sometimes it would work until the aperture was set wider than f8 and then
> would stop working completely. When I removed the Auto Tube from the body
I
> could hear a slight click as something fell back into place.
>
> The mechanism that stops the lens down for exposure worked fine.
>
> I have done some further experiments: the Auto Tube works fine on my OM-4,
2n
> and 1, but it doesn't work on either of my two 4Ti's
>
> Every other lens I have got works fine on the 4Ti - including a 25mm Auto
> Extension Tube.
>
> I'm not sure what the problem is - will a new Auto Tube cure it or do both
my
> 4Ti's need a CLA?
>
> Thanks for any help,
>
> Mike.
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
>
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|