Making a variable ND filter with circular polarizers
November 13, 2007 | Filed Under DIY, Photography | 10 Comments
I read about the Singh-Ray Vari-ND variable neutral density filter and found it really interesting. But then I looked at the price tag… over $300 is a little too much to spend on a filter for my taste.
So I started thinking. Isn’t it basically two polarizers screwed together?
