77mm NDX Variable ND Fader Filter (ND2 - ND1000) for Canon Zoom Super Wide Angle EF 17-40mm f/4L USM

This 77mm NDX variable neutral density filter offers continuous adjustment from ND2 - ND1000 so you can control exposure without swapping glass. Multicoated glass construction reduces reflections and helps maintain image quality across adjustments. Turn the exterior ring to select any density within the range — a quick way to adapt to changing light and avoid adding or changing multiple filters. Designed for use with Canon Zoom Super Wide Angle EF 17-40mm f/4L USM, it lets you precisely dial in the amount of attenuation scene to scene.