HOYA FUSION ONE is a new series of filters based on the new HOYA optical technology. It is aimed to replace the long seller HOYA PRO1D series, which has been widely used by amateur and professional photographers all over the world. The word "ONE" in the naming of this series is left as legacy of HOYA PRO1D, in memory of its contribution to photographers' creativity, with the belief that this new series will serve as well for many decades ahead. HOYA FUSION ONE is joining the HOYA filters line-up with the fusion of all highly valued basic specifications, such as multi-layered coating, ultra-high light transmission, high grade optical glass and low-profile frame, while newly incorporating a stain resistant and water repellent coating to match the new standards in photographic optical accessories industry. Suggested for both amateur and professional photographers.