The NiSi 100x150mm Horizon Neutral Density Filter - ND16 (1.2) - 4 Stop is perfect to use when the light is strong and direct, mostly focused on one portion of the frame. Using the Horizon ND with a Soft GND is the best solution and allow the photographer to choose the best position of the hard transition and balance the light effectively in most situations. The NiSi Horizon ND filter is made from Optical Glass and offers True to Life Color representation. Application scenarios: Sunset, sunrise and strong direct light in a portion of the frame.