Utah Hills, created with the Singh-Ray 15 Stop Mor-Slo Filter After years of experimentation and trying various ND filter combinations, I have assembled what I believe to be the world’s perfect ND kit. It consists of the following Singh-Ray filters: 5-stop Mor-Slo in 82mm 10-stop fixed ND filter in 82mm 15-stop fixed ND filter in 82mm 20-stop fixed ND filter in 82mm Vari-ND in 82mm Step up rings on each of my lenses so they all can use 82mm filters …