The HOYA HRT circular polarizer filter uses a newly developed High-Rate Transparency film that passes more visible light through the filter while still filtering the same amount of polarized light.
The HOYA HRT circular polarizer filter transmits as much as 25% more light through the polarizing film giving the photographer about 1/3 stop more light than a standard circular polarizer. This new polarizing film is also used in the latest HD LCD TVs.
The glass of the HOYA HRT filter also has UV absorbing properties making the HRT a combination UV/circular polarizing filter.
The most common use for a circular polarizer filter is to darken bright blue skies in outdoor photography, but they also can reduce or eliminate reflections from non-metallic surfaces such as glass and water. By rotating the outer ring of the filter the change of effect can be seen by looking though the filter or through the viewfinder if it is mounted on a camera.
HOYA is the world's largest optical glass manufacture, making glass to spec for almost every camera and lens manufacturer. HOYA is also the world's largest filter manufacture.
Reviewed by 3 customers
Works well. Fits well on the lens and fairly easy to manipulate. Does take a little getting used to, but not much of a learning curve.
This filter works well once you get it on the camera. I have large hands and fingers, it would have been nice if Hoya would have made the rings a little larger with more threads on them. I found it difficult to get the filter screwed on secure enough as not to come loose when adjusting it.
Never take it off. This is my second one, the scrathes got a bit much so I bit the bullet. I use it on a Nikon D700 with a Tamron 28-300MM.The only thing I can say is it's worth the money.