Takehiko Ueda wrote:
> I was just wondering. About 15
> years ago, if I remember
> correctly, Pentax encouraged its
> LX users to adopt A lenses,
> because A lenses are sealed like
> LX, if not so much, in
> order to prevent humidity or
> dust from creeping into the
> body.
>
> Is this true?
I don't know how accurate that is. It seems that a lens has to
be vented in some manner to allow for air to move when
temperatures change, or when element groups are moved when
focusing.
--
Shel Belinkoff
mailto:[EMAIL PROTECTED]
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