The Lee Seven 5 Neutral Density (ND) 1.2 Graduated Hard filter for compact system cameras enables users to adjust the exposure across the frame by 4 stops, without affecting the colour balance. This filter is perfect for horizons, or any hard transition between the sky & l&, be that the rooftops of buildings or the peaks of mountains. The Lee Seven 5 filter holder & an adapter ring are required to keep the filter in place.