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Stacking polarizers to make variable ND - Printable Version

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Stacking polarizers to make variable ND - toni-a - 01-09-2021

I do own two circular polarizers
I read to make variable ND I need a circular in the back plus linear polarizer in the front
however two CPL can be used if the front filter is reverse mounted, is that true ? would it work ?


RE: Stacking polarizers to make variable ND - Brightcolours - 01-10-2021

You do not need any "circular". Two PL's will do. You will get X pattern issues fast though, just like with other variable NDs.