Tiffen NATural Neutral Density 0.9 Filter - 55mmCapture True Colors with Unmatched Neutrality Introducing the Tiffen 55mm NATural Full Spectrum Neutral Density 0. 9 Filter, engineered for perfect neutrality across the visual and IR spectrum, ensuring unmatched color fidelity in your cinematic and photographic productions. Filter Size: 55mm Type: Natural Full Spectrum Neutral Density Density: 0. 9 (3 Stops)