Vari-ND Filter

gr82bart · Nov 7, 2007

http://www.singh-ray.com/varind.html

So has anyone used this? Any comments or reviews?

Regards, Art.

Ian Grant · Nov 7, 2007

Just one thing, aren't they polarising filters ?

Use 2 linear polarising filters and you can do the same thing, but you might not want the polarising effect.

Ian

David A. Goldfarb · Nov 7, 2007

Yeah, that's what it looks like to me. You might also not want to add four air-glass surfaces in front of your lens. You could carry two ND filters to cover a lot of situations.

Steve Smith · Nov 7, 2007

Ian Grant said:
Just one thing, aren't they polarising filters ?

That's what I thought. I think this line from the web page confirms it: The Vari-ND can be used with most other Singh-Ray filters except Polarizers

Ian Grant said:
Use 2 linear polarising filters and you can do the same thing, but you might not want the polarising effect.

I remember doing this at school with two sheets of polariser. Add overlapping strips of clear sticky tape to create interesting colour effects.

http://www.physics.utoledo.edu/~lsa/_color/34_polarize.htm using pieces of polyester film instead of tape

Steve.

Vari-ND Filter

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