I have found some lenses sucked more dust than others. For instance, the
elements near the aperture blades of the A50/1.4 can become dirty in no time
(while the A50/1.7 does not). My new love FA77/1.8 which sucked lots of
dust. I used it once only (outdoor) and the glasses inside became quite
dusty (relatively). However, the A35/2.8, the FA43/1.9 and the FA*24/2 are
still pretty clean (inside) after many uses. A70-210/4 is another dust
sucker (pretty bad indeed). So I guess it depends on the lens itself, rather
than the whole series.
regards,
Alan Chan
>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? If so, is this also true to F or FA lenses?
>When I'm in search for Pentax lenses, at first I seek for A
>lenses, because I'd like my Super-A fully equipped, and I
>don't like dust or humidity to creep into my LX.
>
>If the same seal, as A lenses, is adopted to F or FA lenses,
>there would be no reason for me to cling to A series, to
>put aside the taste for more metal-like lenses<g>.
>
>Does anyone know about this?
>
>Sincerely,
>
>****************************
>Take Ueda, Osaka, Japan
>[EMAIL PROTECTED]
>http://members.tripod.co.jp/hayatama/photo/
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