The hoya 77mm uv ir cut filter is a new type of filter from hoya in 49mm through 82mm sizes this specialised filter has the ability to cut out both uv rays below 390nm and ir rays above 700mn leaving just the light rays in the visible spectrum passing through the filters and into the camera this is important because ccd and cmos sensors are extremely susceptible to uv and ir rays just outside the visible spectrum that have a very negative impact on image quality the hoya 77mm uv ir c