The Tiffen T1 IR Filter is designed to be used with cameras such as the Panavision Genesis and Sony F35 (CCD), and Sony EX1/ EX3 (3 CMOS Chip). CCD and CMOS sensors are made from Silicon, which is inherently sensitive to infrared energy. The Tiffen T1 IR Filter is designed to address the IR contamination associated with these sensors. This contamination is most visible in dark fabrics, greens become a reddish muddy brown and blacks have a magenta hue.The Tiffen T1 IR Filter is manufactured using Tiffen’s proprietary ColorCore technology, where each effect is captured between two pieces of glass. This allows Tiffen to grind and polish both surfaces providing the cinematographer with perfect parallelism and worry free handling. The T1 IR filter contains no dichroic coating; therefore, it will not vignette green, magenta, or cyan at wide angles. This filter can be stacked with Neutral Densities up to 0.9; however, for best results Tiffen recommends using the Tiifen Full Spectrum IRND’s when heavier densities are required.