On 2/25/2013 4:07 PM, Wayne Harridge wrote:
> >From memory it's safe to undo the 3 mount screws and take a look inside, you
> shouldn't have spring loaded parts flying around or ball bearings dropping
> out !
Ah, I see. I just opened mine up. The design is different than other OM lenses
I've worked on, with the mechanisms on
the back of the mount, rather than on the back of the lens proper, and covered
by the mount.
Mine is fine, as I knew from last using it. Looks like one could make a
preemptive strike with epoxy over the tow posts
and spring, as long as it's one that will bond to that plastic.
As to Martin's concern, there's nothing to fall out/off. You do need to pay
attention to which way it is mounted and
where the prongs that reach down into the body go.
Putting it back on, the prong that has protuberances at the end has to slip
over the matching lever inside. The other
prong needs to be on the correct side of the its matching lever in the lens. As
I had not moved the aperture ring, I
watched that the prongs slid into the right places and aperture setting relay
tab, aperture actuation tab and aperture
stop down button all operate properly.
I found it to be a very simple thing to open up and reassemble, but then, I'll
open anything, and have decades of
practice at putting what I open back together.
> My 135/3.5 had the same problem many years ago, a particularly poor piece of
> Oly design. Looks to me more like a materials, or even assembly problem. The
> design is elegantly simple, with nothing to come loose. No screws, and the
> other spring is glued to its post.
If plastic material is right, and assembly melts the plastic properly, with no
residual stress, it should last
indefinitely. Screws would certainly be more serviceable, but with the right
material and assembly, it should never need
that.
Fatigued Plastic Moose
--
What if the Hokey Pokey *IS* what it's all about?
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