72mm NDX Variable Neutral Density Fader Filter (ND2 - ND1000) for Olympus Evolt E-420

72mm NDX variable neutral density fader designed for the Olympus Evolt E-420. Density is continuously adjustable from ND2 - ND1000, so you can precisely control exposure without swapping glass. Multicoated glass construction preserves image quality across a wide range of lighting conditions. Adjustments are made by simply turning the exterior ring to select any desired neutral density setting. This variable neutral density filter saves time changing or stacking filters and lets you dial in differing amounts of density scene to scene.