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Cavision 4x4" Hot Mirror Neutral Density 0.9 Glass Filter

The Hot Mirror filter reduces the amount of infra-red light entering the lens while having no affect on the wavelengths of light in the visible spectrum. Digital sensors are especially sensitive to IR light, which can cause aberrations and color shifting in the image. The hot mirror filter is especially useful when using a neutral density filter because the ND filter will increase the ratio of IR light to visible light.

The Hot Mirror ND filter accomplishes both tasks in one combination filter, freeing up an extra filer stage in your matte box. Cavision's 30 layer coating technology ensures complete IR wavelength reduction accuracy.