We’re not sure how we missed this one back at CES, but Hoya’s new HD2 filters are really quite jaw dropping. In the video after the jump, a company rep smacks the filter repeatedly with a pipe–and it doesn’t shatter. The process starts with chemically hardened L37 optical glass has almost four times the strength of normal optical glass–or so they claim. Hoya then uses a 16-layer (8 layer each side) nano-coating process that yields a multi-coated filter with an extremely high transmission curve. The top layer is made into a hardened anti-scratch layer that is also stain and water resistant. The filters also can come in the circular polarizer type, which uses a special High-Trans circular polarizing film that has 41% greater light transmission than standard circular polarizing film, the company once again claims.