It is a thin slice of tooth, less than 1mm thick, placed between to cpl filters, arranged at 90° so than cross polarisation can be achieved, and backlit with a flash.
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It is a thin slice of tooth, less than 1mm thick, placed between to cpl filters, arranged at 90° so than cross polarisation can be achieved, and backlit with a flash.
waaah! this was smart 🤸🙏