The K&F Concept 72mm Variable ND Filter ND2-ND400 Nano-X Series HMC is a high-quality circular filter designed for cameras and lenses. With a clear filter color and a size of 72mm, this filter allows for adjustable neutral density values ranging from ND2 to ND400, providing versatility for photographers and filmmakers in various lighting conditions. The Nano-X Series HMC coating ensures excellent image quality and protection for the lens.