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These Tiffen 4x4 Infrared Neutral Density Filters 0.3-2.1 are now available and come in seven different strengths! CCD and CMOS sensors of a digital cameras are inherently susceptible to infrared contamination, even when the manufacturer attempts to reduce this problem by adding an infrared absorbing filter on top of the image sensor. Because these filters do not have a sharp cutoff at the infrared wavelengths there has to be a compromise in order not to exclude visible red wavelengths. This results in some infrared wavelengths being allowed to pass. While minor infrared contamination does not normally cause much of a problem for visible images, when using conventional neutral density filters especially denser grades, this issue is multiplied by the filter factor. Tiffen has now addressed this problem with the introduction of its exclusive line of IR ND and IR 85ND series filters. Using Tiffenﾒs exclusive ColorCore™ filter technology, Tiffen engineers have been able to eliminate Infrared bleed above 700nm. This is particularly important as it now allows for the use of the denser grades of Neutral Density filters needed for these light sensitive cameras while, at the same time, maintaining complete color balance. The Tiffen IR ND series is produced using Water White glass. As with all Tiffen filters, IR ND filters are ground and polished to provide the greatest level of flatness and parallelism. This, together with their exclusive ColorCore™ technology, ensures the highest level of optical quality. The IR ND and IR 85ND filters are available in Panavision 4x5.650 sizes. Tiffen IR ND Strengths:
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