Genustech Eclipse Fader ND filter 77mm. This variable ND filter is for lenses with a 77mm filter thread. By rotating the filter you can easily fine tune the amount of light entering your lens. The wider front element minimizes vignetting when using wider lenses. The Eclipse ND Fader filter has approximately 2 to 8 stops of Neutral Density . The use of new laser technology ensures superior colour fidelity and sharpness when compared to competing products. The Genustech Eclipse ND Fader redefines the price point for a quality vari-ND filter. The wider front element minimises vignetting when using wider lenses.