Century Optics 4x4" Graduated Soft Edge Neutral Density ND .6, 4x, Filter.

ND .6 Soft Edge Graduated Filter.... Employs a surface that is 50% clear and 50% with a neutral density of 0.6. The shift from clear to ND is achieved with a SOFT EDGE (SE) transition line.

The ND .6 Soft Edge Graduated Filter balances exposure within a scene for example, the exposure of sky and earth in a landscape, avoiding overexposed blank white skies.