What do you re-cement the elements with?
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John Hermanson www.zuiko.com
Camtech, Olympus Sales & Service since 1977
21 South Lane, Huntington NY 11743-4714
631-424-2121 For Free Olympus manuals,
please call 1-800-221-3000
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----- Original Message -----
From: <clintonr@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, October 13, 2002 2:47 AM
Subject: Re: [OM] 75-150mm lens separation
> Sometimes, early on, we'd see separation in conjunction with impact, but
> not always. Over time it became obvious that the impact would only
> accelerate the separation, not directly cause it.
>
> No, upon disassembly, you'll see that the third "group" from the front
> (the second "floating" group) will be soaked in oil! Seems the lube Oly
> used to make things move smoothly gets too runny, and ends up invading
> the housing that holds the third group. This group is actually two
> elements cemented together. Over time, the oil would dissolve the
> cement. The most obvious result is that the lens won't focus at
> infinity. I don't know how it would affect image quality otherwise.
>
> The bad news is that the element is no longer available new (where have
> we heard that before? ;^). The good news is that it's easy to get to,
> and easy to re-cement! So if you've got a 75-150 in really good
> condition, it might be worth repairing!
>
>
> NSURIT@xxxxxxx wrote:
> >
> > I would like to hear from any who know the cause and affect of lens
> > separation in these lenses. Over the past 2 or 3 years I have had the
> > opportunity to see 3 or 4 of these lenses that had what I think is
> > lens separation on interior lenses. When you hold the lens up to a
> > light source you can see clear lines inside the lens. The questions
> > are: "What causes this?" and "What affect does it have on your
> > images?" Bill Barber
>
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