67mm NDX Variable Neutral Density Fader Filter Adjustable from ND2 - ND1000 for Canon EF-S 18-135mm f/3.5-5.6 is

Compact variable neutral density solution that covers ND2 - ND1000 in a single 67mm filter. The NDX fader lets you smoothly vary light reduction without swapping filters. Multicoated glass construction maintains image quality across different lighting situations. Rotate the external ring to select any density setting quickly — a time-saving alternative to adding or changing multiple filters and ideal for dialing exposure scene to scene.