The Tiffen 4 x 5.65" Full Spectrum IRND 0.3 filter is a combination of an infrared control filter and a 0.3 neutral density filter. An IRND is ideal for HD cameras, which have greater low-light sensitivity and, consequently, increased sensitivity to IR contamination. When using a standard neutral density filter to counter the increased light sensitivity offered by the HD sensor, the effects of infrared pollution become more apparent. This filter combines an ND filter with a comparable IR control filter to eliminate infrared light spillage reaching the sensor whilst maintaining the additional exposure benefits of a neutral density filter. This filter is constructed from Water White glass and is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and polishing it flat to a tolerance of one ten-thousandth of an inch. This filter measures 4 x 5.65" / 101.6 x 143.5 mm. - The infrared control filter helps block infrared pollution affecting image colour fidelity; this allows for a wider colour gamut and truer colours, particularly noticeable in the darker regions of the image. - The 0.3 neutral density filter provides a 1-stop exposure reduction. - Water White optical glass for excellent clarity. Specifications