The 850nm 4 x 5.65" Cine Infrared Pro Filter from Kolari Vision is a multicoated glass filter for compatible matte boxes. It blocks visible light up to 850nm from the light spectrum. Unlike the 550/590/665nm versions of this Kolari filter, this 850nm version does not require a full spectrum modification to be made to your camera, but only as long as you use the camera mounted on a tripod and set long exposures. Otherwise, a full spectrum modification is required, like our KipperTie Full Spectrum OLPF.