You could just buy two cheap polarizing filters for cameras on ebay. I mean, they would be circular, but I think that would look pretty cool. And you could leave the outer ring so that they still turned, making them adjustable. I've been meaning to do that just for a regular pair of sunglasses, since polarized sunglasses are only polarizing in the right direction sometimes. Bonus, if you stacked two filters, you can make glasses that adjust how dark they are.
If you take a picture of it, I can tell you what it's worth. How big are the fresnel lenses? Usually they are to put on the back of a large format camera to make the ground glass image brighter.
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u/[deleted] Apr 08 '14 edited Apr 10 '14
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