Umm, a variable ND *is* a two polarisers mounted in tandem!
Thanks for your spelling of polariser!
Pierz
On 20 May 2016 5:08 p.m., "Chris Trask" <christrask@xxxxxxxxxxxxx> wrote:
>
>
> Interestingly, a variable ND filter can be used as a double-ring
polariser in situations where both sky and water reflections need to be
controlled.
>
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