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Re: [OM] Lens element separation

Subject: Re: [OM] Lens element separation
From: "Charles Loeven" <cpl49@xxxxxxxxxxxxx>
Date: Wed, 31 Mar 1999 11:41:02 -0500
Wayne Harridge, me aussie mate wrote,


<<I have a lens which exhibits "separation" (not a Zuiko by the way).  When
I
look through the lens, off camera, at an evenly lit surface, I see a series
of a few almost concentric rings/bands, not grey, but slightly coloured.
These are interference fringes caused by reflection from the separated
surfaces.>>

I don't have anything like that. :-)

<<I was told that the problem CAN be repaired, however it relies on
completely
separating the cemented elements, cleaning and re-cementing.  I was advised
that it wasn't worth attempting for my lens.  I guess you would need to get
a quote for the work to decide if it is worthwhile for your particular lens,
probably not worth it for a 50mm f1.8.>>

I guess the next step is to send it away for an estimate. :-(

<<What colour is the fungus ?  Are there different species of fungus for
SC/MC
lenses ?>>

The problem looks like this; A few spots where there is spidery looking
"stains".  Also the entire surface of at least one piece of glass looks as
though someone spilled a little champagne on it and the bubbles staid there.
I would say the marks are colorless.
BTW it is not a 50 f1.8 but a 85 f2. My favorite lens.


Thanks Wayne.

Charlie L.



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