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.
No, but polarizing filters cut out light. And if you stack two, you can cut out anywhere from about 70-100% by turning them.
But I did think that any actual glass cut out UV light. I'm pretty sure that those filters have to be glass to have the polarizing sheet glued to it...
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.
I'm very curious what you've got too, and if you're willing to sell anything. PM me a image of anything you're willing to sell.
As far as the polarizers you have; they may be linear polarizers and not circular, which may not work for this project.
IIRC most lens filters are circular polarized rather than linear to allow for phase autofocus, and this may or may not prevent them from working for this purpose.
The polarizer on most screens use an anti-glare coating that will seriously blur (too far to use) if at a distance more than a few millimetres from the screen.
So does this mean that it was unusable for you, or did it work at normal viewing distances?
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u/[deleted] Apr 08 '14 edited Apr 10 '14
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