While ensuring rapid and effortless adaptability, the 67mm Nano-x Nd8-128 3-7 Stop Magnetic Variable Neutral Density Lens Filter revolutionizes the way photographers manage light exposure and composition. This innovative filter features a magnetic attachment system that allows for near-instantaneous installation and swapping, a significant improvement over the traditional threaded filters which typically take around six seconds to secure. The magnetic technology streamlines the process by simply requiring the user to attach the filter adapter ring onto the lens initially. Once in place, the filter can be magnetically secured in just one second, enabling photographers to respond quickly to changing lighting conditions without fumbling with threads.KandF Concept's advanced frame self-lock technology ensures that users will not experience the dreaded "X" cross effect, which is a common issue with variable ND filters, especially when used with wide-angle and telephoto lenses..