Heliopan variable ND filter anyone?

Started Nov 23, 2012 | Discussions thread
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Alekhine
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Heliopan variable ND filter anyone?
Nov 23, 2012

Hi,

I'm about to order an Heliopan 82 ND variable filter.

I often use a Lee Big Stopper (10 stops) which is great but sometimes I need less stops reduction, say 3-5 stops.

Anyway, I have a couple of question before buying.

1. I heard these variable ND filters are actually made by two polarizers, is this true for all variable ND?

2. If this heliopan is made of two polarizers, will it have a polarizing effect when shooting water?

I actually like that "soft silk" effect on the water when shooting long exposure, like the image below (96 seconds). I'm afraid I won't get the same effect when polarizing comes into account.

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