Obviously, the 135mm/2.8 didn't want to make the trip.
Two concerns: if the aperture/aperture arm are very stiff, it _might_
hang-up the camera (if so, the shutter will fire as you remove the
lens). Cold may exacerbate the problem. And, if you're using a Program
camera (OM-PC/40, OM-2s/sp), you might get some variation in the
exposures.
Cause? The lubrication in the helicoid has taken a detour and gotten
onto the aperture's mechanism.
Solution? Usually, only removeal and thorough cleaning of all parts and
body parts results in a long-term repair. Not a DIY (Do It Yourself)
Project, especially if it's not a Zuiko lens....
Michael Stahulak wrote:
>
> I was going over my lenses last night (still trying to figure out what I'm
> taking on my backpacking trip - and what I'm going to carry it all in), and
> I noticed -- oil on the aperture blades of my 135/2.8 !!!. I also noticed a
> little sluggishness in aperture operation. It seems to me that there was no
> oil on the blades the last time I played with this lens only a week or two
> ago.
>
> As far as the aperture sluggishness, it seems to me that the way OM lenses
> work (normally open, stop down driven directly?) that it can't be a real
> issue in photographs. Or can it?
>
> Can anyone tell me how this happened, what (if anything) to do to fix it,
> and what it means practically (aside from the already noticed sluggishness)?
> I have to confess that I've had this lens for probably 24 years, and have
> used it very little in this time, so aside from carrying it all over with
> me, it should be in good shape.
>
> BTW, thanks everyone for all the recommendations for a backpacking kit and
> ways to carry it. When I've finally sorted out what I'm doing, I will report
> back to the group.
>
> Thanks,
>
> Mike
>
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