Ultra Slim Technology
This technology manufactured a high quality 2mm thick filter glass.
Low Profile Frame
Ultra thin filter frames (1mm) to help avoid vignette on super wide angle lenses. It is thinner than Kenko Pro 1D series filter(Also Hoya Pro 1D Series).
Multi Coated (Both Side)
Multi Coated filter greatly reduce lens flare and ghosting caused by reflections.
Oil Pressure injection technology
This technology manufactured the glass inside the frame, it also reduce the frame thickness of the filter.