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Quote:Would it work if I put 2 circular polarizers will I have a graduate ND ?
Graduale? I guess gradual? A gradual ND (GND) filter is a filer that goes from dark to light. They are used to make bright skies darker while keeping the rest light, for instance. 

[Image: How_to_use_ND_grad_filters_CAN104.projec...7C8630.jpg]
Quote:Graduale? I guess gradual? A gradual ND (GND) filter is a filer that goes from dark to light. They are used to make bright skies darker while keeping the rest light, for instance. 

[Image: How_to_use_ND_grad_filters_CAN104.projec...7C8630.jpg]
I meant variable filters sorry

if I put 2 circular polarizers willI have a variable ND filter ? 
As explained above that you need at least one linear pol. filter.

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