Robert VanNatta wrote:
> I was of the impression that a circular polarizer was needed when
> you had one of those screwy lenses (like the 80-320) in which the
> focusing action rotated the front element (and the filter mount),
> making it difficult to keep a conventional polarizer correctly
> oriented. Maybe I am wrong.
:^) you seem to want an "automatic polarizer" ;^)
You still must orient the polarizer to relative to what
degree of polarization effect desired w/ either type.
The circular ones are needed by certain AF cameras which use
some sort of mirroring in them. Someone else will have more
detailed info, sooner or later. Having to re-adjust when
changing focus distance can be a nuisance, though.
Bill
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Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
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