This high-quality filter set is designed with Pure High Definition Optical Glass, featuring 18 layers of multicoating. This advanced coating technology ensures an enhanced filmmaking experience by providing superior light transmission and reducing reflections. The built-in hard stop feature of this Variable ND filter eliminates any chance of cross-polarization, ensuring a clean and clear image capture. Moreover, it guarantees zero vignetting for lenses 16mm and above, allowing for a seamless shooting experience. The 2-5 Stop filter, equivalent to ND4-ND32, and the 6-9 Stop filter, equivalent to ND64-ND512, provide a comprehensive range of light control. This makes it an ultimate all-day solution, capable of adapting from cloudy days to bright sunny conditions. This versatility makes it an essential tool for all your videography needs, whether you're shooting a cinematic film or capturing a stunning landscape.