It's usually grease from the focusing helicoid that has liquified and
run down onto the aperture blades. This is sometimes the result of a
lens being subjected to a lot of heat while stored front-glass-up. It's
common and easily repaired. Good luck with your new lens.
Paul
dosk wrote:
>
> GOOD NEWS arrived yesterday via old Ma Bell... Seems the Kiron 24/2 k-mount
> I returned to Ken-Mar Cameras (LI, NYC) can be repaired, and Ken, the man
> himself, says his tech will do this thing and I should expect the lens's
> return shortly!
> Yay!! My $69.00 WA is coming home! (And it will earn it's keep too; I have
> all kinds of shots lined up and waiting patiently for it...)
> Ken, the man himself, says the problem was "oil on the shutter blades."
>
> So, what's "oil on the shutter blades" mean anyway? I've heard this phrase
> before, but why is there oil inside a lens in the first place? Is it needed?
> How does it get in there?
> (Is it 10W???)
> Skip
>
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