The Zuiko 135mm f 2.8 was indeed produced in a multi-coated version. I own
one. It's s/n 183XXX, has "MC" on the lens trim ring, and obvious
multi-coating on the elements.
I doubt if multi-coating by itself makes much of a performance difference
in this particular lens; after all, they're aren't that many elements to
it. My 35-70mm zoom is another story, I'm sure (13 elements, as I
recall???).
My 135mm also has a couple of paint specks floating around inside of it.
They've never affected its performance, as near as I can tell.
Regards,
Mahlon
--------------------------------------------
>On 24 Aug 98, at 19:07, claudeb wrote:
> I have a problem with a couple of my lenses. The 135 2.8 which is
> single coated (is there no mc version?), has oil on the diaphragm. The
> 85 2.0 has specks of black stuff behind the front element. A repair guy
> here in SB said it will not affect the performance of the lens,
> nonetheless the specks are rather alarming. Any tips on where to go for
> repairs from my fellow olympo-philes?
>
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