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- Gel circular polarising filter 1 answer
I am looking for a polarizer gel for our lights, but specifically one for creating left or right handed circular polarization.
I can find linear gels all over the place. I can even find circular filters for the camera. But no circular gels.
Does this even exist or is it something that isn't possible to do in a gel?
Edit since there are so many questions and links to other questions:
Quick high level explanation for what I am attempting to experiment with:
On set I will have multiple light sources. I want one set to be Right-handed and the other will be Left-handed.
Then 2 cameras will shoot the same scene, one with a Right-handed filter and the other with a Left-handed filter.
Why circular and not linear? If you are using linear polarized light and linear polarized filters then your filter has to be correctly aligned to properly work. Rotating the filter will change what polarization it filters out. Also, linear polarization can change it's direction easily when bouncing off different surfaces.
Think of a 3D movie that uses this tech. 2 projectors use left and right handed polarization. Your glasses filter out each one almost perfectly AND you can tilt your head without screwing with what light is being filtered through.
I'm not an expert on this topic but I do believe I know enough to know what I need. I found in another thread that in photography terminology on this topic is a bit "messed up" and may have different meanings to different people.