- XP120 - 2X graduated neutral density filter reduces the light 1 stop.
- XP121 - 8X graduated neutral density filter reduces the light 3 stops.
- XP121L - 2X Light starts with the same neutral density as XP120, but feathers the grey almost from the color edge and more gently graduates to clear. One stop of compensation.
- XP121M - 4X Medium is the same gentle graduation as XP121L but with twice in density. Requires 2 stops of compensation.
- XP121S - 8X Soft is twice the density of XP121M and the graduation extends to 3/4 of the filter. Requires 3 stops.
The Cokin hard-edge 3-stop graduated Neutral Density filter helps darken specific areas of the image, like bright skies, while leaving other areas of the image unaffected. The filter is most dense at the edge and tapers to clear at the middle, with a hard-edged line of transition. A Neutral Density filter with a hard-edged line of transition is useful for images with defined horizon lines. Neutral Density filters do not affect the color of the image while creating a more balanced exposure.
