In a message dated 98-12-23 09:59:29 EST, you write:
<< >> why is interior dust so common with used lenses? <snip>
>>
> I have noticed the same thing. Don't know whether it's dust or tiny
>paint flakes (my guess), but they seem to be more prevalent in "used" than
>"new" of the same age. >>
My theory is that focusing the lens causes a "pump" effect. When the lens
extends to focus closer, some air has to go into the lens, and along with the
air, dust.
Warren Kato
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|