The Lee Filters LEE85 ND0.9 Grad Medium comes as part of three LEE medium neutral density filters: 0.3 - 1 Stop, 0.6 - 2 Stop and 0.9 - 3 Stop. They are formulated with harder than usual grad lines which compensate for smaller sensor sizes. These filters have a medium-dark to light transition which allows selective adjustment of exposure across the frame without affecting colour balance. LEE85 hard grad filters are designed for the harshest lighting and super-long exposures. Low exposure photography can suffer from exposure issues between foreground and sky. When this happens, detail suffers and often you can experience the ""white-out"" effect. Hard grad filters help to avoid this and allow you to capture incredible detail and creativity. They're best suited when photographing on peaks of mountains or sea-sky horizons where light can be at its harshest.