I often put a dot of rubber cement on spring ends. They are often just
a loop hooked through a hole.
90 f2 diaphragm could become sluggish due to oil in the coupling ring.
It's a big ring and imo should have been designed with some ball
bearings (same goes for 100 f2).
___________________________________
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
Dawid Loubser wrote:
> I also have no idea how this happened, but the spring does not
> hook onto both ends very securely, the one end is secure (through
> a hole) the other is just the spring hooking *around* a sort-of small
> pin.
>
> I can see how, over the years, and with the spring hook slowly bending
> more
> open, it could one day decide to dislodge from around the pin :-) At
> least it's
> a really easy fix, but a good pick to hook the spring is a must, I
> battled a bit
> even though I used a very good, small-ended tweezer from an
> electronics kit.
>
> The spring in my 90/2.0 seems to have weakened, i.e. sometimes, right
> at the maximum
> setting (f/22) the aperture does not close, or quickly in anyway, but
> at f/16 down it's
> perfectly snappy. It's always been this way since I obtained the lens,
> but I'll replace the
> spring one day, now that I know where it is :-)
>
> Thanks again all, I am a happy camper with my 90/2.0 - life just feels
> wrong without it...
>
> On 25 Jun 2009, at 10:07 AM, Ralf Loi wrote:
>
>> <<
>> How do you suppose the spring got disconnected?
>>
>> Joel W.
>> That happened also to my 135/2.8 some time ago.
>> Never understood how it happened. The lens was never dropped
>> or abused in any way.
>
>
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