The Fotodiox Graduated Neutral Density Filter features a soft edge gradual (with +2 stop on the darkest side) which decreases near the center of the filter allowing for emphasis of foregrounds or backgrounds. The darkened area of the filter gradually fades out, so the boundary between the darkened and transparent sections of the filter will not become apparent even with the lens aperture stopped down. Each Filter comes with a storage case. The filter is double threaded and allows other filter to be stacked on top.
Example use for graduated filter: