Overcome challenging lighting conditions and unlock creative potential with the NiSi Filters 100mm Nd Base Kit, a premium selection of 100x100mm Ir Neutral Density Filters designed for the discerning photographer. This kit includes two essential Nd filters: the Irnd 0.9 (3-Stop) and the Irnd 1.8 (6-Stop), each crafted to provide precise light attenuation for optimal exposure control.The Irnd 0.9 (3-Stop) filter is an indispensable tool for capturing the silky smoothness of waterfalls or the serene flow of rivers, enabling shutter speeds ranging from 0.5 to 2 seconds. It's perfect for photographers aiming to convey motion without sacrificing image sharpness.For more extended exposure needs, the Irnd 1.8 (6-Stop) filter steps in, particularly useful during the golden hour when you're looking to create exposures of 1-2 minutes.