The Hoya Portrait filter is a subtle intensifying filter using "didymium" glass with a different chemical composition. Didymium filters are also referred to as "Band Pass" filters.
- Through this band pass effect, Hoya has developed a filter that subtly increases saturation of the pink component in skin tones by reducing both the yellow and orange cast of people's complexion, and it does not give an over-all color cast to the photograph
- Over all color casting has been a problem with intensifying/color enhancing filter available from other manufacturers
- The Hoya Portrait filter is available in filter sizes 49mm through 77mm