The Fusion One series filters from HOYA are a new line of filters based on HOYA's new optical technology. Their purpose is to replace the HOYA PRO1D series, which has been widely used by amateur and professional photographers around the world. The word "One" in the name of this series remains as a legacy of the PRO1D series, in memory of its contribution to photographers' creativity, with the belief that this new series will serve them just as well for many decades. 

The Fusion One series is part of HOYA's filter lines, using all the basic high-performance specifications such as multi-layer coating, ultra-high light transmission, high-quality optical glass, low-profile frame, and water-repellent coating to match the new standards of the photographic optical accessories industry. It is recommended for both amateur and professional photographers.