Hoya (0886) Hoya 72mm PRO ND Kit- Includes ND8 ND64 ND1000 Filters With long shutter-speed photography becoming more and more popular HOYA have produced a filter kit containing 3 of their most popular ProND solid Neutral Density (ND) filters all in one package.Although HOYA already offer individual ProND filters ranging from ND2 to ND100000 this kit is designed to give photographers and cinematographers an easy solution to the ultimate in light control. It includes ND8 (3 stop) ND64 (6 stop) and ND1000 (10 stop) density filters complete with a folding padded case.Hoya ProND filters are made in Japan from the highest quality optical glass. Using ACCU-ND metallic coating technology the glass is coated front and rear to equally reduce the light spectrum (including IR) with a truly neutral colour balance. As the colour balance is so neutral it is possible to use 2 ProND filters together. For example ND8 and ND1000 multiply together give a combined value of ND8000!