The Hoya low profile circular polarizer takes advantage of Hoya's patented optical glass technology to create a hardened glass that is thinner than the normal optical glass. This allows the overall thickness of the filter to be reduced to avoid vignetting when used with ultra-wide angle lenses. The Hoya Super-HMC PRO 1 low-profile frame is a slim 5 mm, making it the same size as a regular Hoya filter frame. Standard Hoya circular polarizer frames are 7.5 mm thick where other manufacturers are as much as 10 mm thick.

Another advantage to the Super-HMC PRO 1 Circular Polarizer is it has normal front filter threads meaning a normal clip-on style lens cap may be used. The Super-HMC PRO 1 Circular Polarizer has a 6 layer Hoya multi-coating, the most used in the industry, applied to the front surface of the filter to greatly reduce the chance of lens flare or ghosting caused by reflections.

Screw mount: 67mm