HOYA HRT Lens Filter with High Transparency Capacity

This filter utilizes a new High Transparency Film technology that allows more visible light to pass through while simultaneously filtering the same amount of polarized light. The HOYA HRT circular polarizer transmits up to 25% more light through the polarizing film, providing the photographer with approximately 1/3 of a stop more light compared to a standard circular polarizer.

UV Absorption

The glass of the HOYA HRT filter also has UV absorption properties, making the HRT a combination of UV filter and circular polarizer. The most common use of the circular polarizer is to shade bright blue skies in outdoor photography, but it can also reduce or eliminate reflections from non-metallic surfaces like glass and water. By rotating the outer ring of the filter, the change in effect can be observed by looking through the filter or through the viewfinder if mounted on a camera.