It sounds like a chemical diffusion (leaching) artifact, possibly due to
the makeup of that type of glass in that element. Repolishing is the only
(temporary) cure for that sort of thing. It may end up reappearing in
time, as more diffusion occurs.
On 6/26/14 2:58 AM, "olympus-request@xxxxxxxxxxxxxxxxx"
<olympus-request@xxxxxxxxxxxxxxxxx> wrote:
>I don't know what causes it in this specific way on this specific lens
>but it's quite unusual. An even frost etching over the whole surface,
>nothing like fungus.
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