The lee sw150 neutral density nd grad very hard filter set contains three 150 x 170mm graduated resin filters 03 06 and 09 that enable the photographer to adjust exposure by 1 2 and 3 stops over part of the photograph without affecting the colour balance the very hard nd is perfect for scenes such as seascapes that feature a defined horizon line the transition between the coated and clear sections of the filter is extremely sharp allowing for precision separation between the filte