Hitech's 67 x 80mm 3 Green Color Grad Soft Camera Filter is a cooling filter with a bright green effect. This filter is clear in the bottom half of the filter with a gradual transition to the color effect in the top half. It is primarily used for skylines of landscape shots. Soft edge grads have a smooth transition from clear to neutral density. Different graduated color filters can be used in combination together or with solid color or neutral density filters to give interesting bespoke effects.