Hoya 55mm G Series Circular Polarizer Fliter - (Screw in)

Each Hoya filter is the result of research, know-how and complete precision facilities backed by full quality control.

Before production starts, controls are first programmed into a computer. Then the finest materials are carefully mixed by an automatic V-blender for absolute uniformity. After being melted with highly sophisticated equipment, this material is then precision molded with automatic direct pressing equipment. The pressed blanks are next slowly and continuously cooled to remove strain, and are then polished by high-speed, double-surface polishing machines that assure precise surface quality and perfect flatness.