You got it right although there's no statement here about which is the
camera end on a circular... but you don't need to know either.
<http://www.earthboundlight.com/phototips/linear-or-circular-polarizer.html>
Chuck Norcutt
usher99@xxxxxxx wrote:
> Yep, I noticed that. That B&W pol had a super score too. Either they
> sent the wrong one or glued in the quater wave plate at an angle of 0
> or 90 degrees against the azimuth of the polarizer, as mentioned. It
> was marked on the box AND ring of the pol as circular. Not good no
> matter how you slice it.
>
> Oh, the mirror test---the linear pol looks the same either way looking
> at its image in the mirror. The ciirc pol is dark with the cam side at
> your eye.
> I think I got that right.
>
> Mike
>
>
> I suppose the manufacturers didn't know the test was being conducted. I
> think you can be sure B&W wouldn't have sent a linear polarizer marked
> circular if requested to provide a unit for test. ;-) Yes, you can test
> in seconds, but I don't recall how at the moment.
>
> Moose
>
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