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Author Topic: Singh-Ray ND as Polarizer.  (Read 1925 times)

ucs308

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Singh-Ray ND as Polarizer.
« on: July 15, 2011, 09:25:00 pm »

Not sure if this is the right forum, please feel free to redirect if am in the wrong place.

The short version of a long story...I have a job I am preping for. I am away from my studio trying to get the parts I need to together.. I need to polarize lights and camera for a project coming up. I don't have a polarizer for the my current macro lens and wondered if in a pinch the Singh-Ray ND (I already own) would work. I am trying to reduce the glare from a very shiney surface. I thought I read somewhere the Sing-Ray ND is essentially two back-to-back polarizers.

Thanks-in advance.
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neile

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Re: Singh-Ray ND as Polarizer.
« Reply #1 on: July 17, 2011, 11:31:27 pm »

You're thinking of their Vari-ND, which is two polarizers stuck together. A regular ND filter is just neutral density and has no effect on polarization.

Neil
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Wayne Fox

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Re: Singh-Ray ND as Polarizer.
« Reply #2 on: July 18, 2011, 02:19:04 pm »

I would think if you set the Singh-Ray vari ND to filter to it's brightest setting, you'll see effects of a polarizer.  It will be twice as dense so you're losing a lot more light, but it might work in a pinch.
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Wayne Fox

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Re: Singh-Ray ND as Polarizer.
« Reply #3 on: July 22, 2011, 04:05:09 pm »

Just thought I'd add a note to this.  Singh-Ray now sells a Vari-N-Duo, which is basically their variND filter with an additional rotation point behind the two rotating glass elements, which "adds" a polarizer.  I saw one of these last night in a workshop we  held, and all it adds is the ability to freely rotate the two glass elements, indicating using this as a  polarizer definitely works.  If you don't have this duo version, you would have to unscrew the filter to rotate it, but certainly would work as a polarizer.
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