77mm NDX Variable Neutral Density Fader Filter (ND2 - ND1000) for Canon Telephoto EF 400mm f/5.6L USM

Designed for use with the Canon Telephoto EF 400mm f/5.6L USM, this 77mm NDX variable neutral density fader lets you adjust exposure quickly without swapping glass. Simply turn the exterior ring to set any value between ND2 - ND1000 and precisely control the amount of light entering the lens. Built from multicoated glass, the filter reduces reflections while preserving image clarity across varying lighting situations. Its adjustable range saves time on location by allowing you to dial in different densities scene to scene for maximum versatility.