Linear v Circular Polarizers

Started Feb 8, 2013 | Discussions thread
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Circular Polarizer Shootout
In reply to Big Ga, Feb 11, 2013

Big Ga wrote:

And also.....

What is different about a Käsemann polarizing filter?
Of all the B+W polarizing filters which we offer, the Käsemann configuration has the highest optical quality.

Ok, so different polarisers have different 'optical quality' (whatever that means)

For what its worth, here is the best test I've found for polarizers, all circular,

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