The Schneider 4x5.65" Warm Black Frost 1/4 filter is a professional optical tool used by cinematographers to control image characteristics creatively. This specific grade (1/4) offers a light level of effect within the Warm Black Frost series. Its dual function is particularly valuable: it applies the "Black Frost" effect, which reduces overall contrast by subtly flaring bright sources of light and softening harsh edges, without noticeably reducing image sharpness or resolution. Simultaneously, the filter imparts a subtle warm bias to the image, which is particularly effective for creating healthier, more pleasing skin tones and adding a romantic or inviting ambiance to the scene. Like all Schneider professional glass filters, it is made from high-quality water white glass, ensuring no unwanted color shifts other than the intended warming effect, and its sturdy construction is designed for the rigors of production use.