Lee 4x6 graduated mahogany 3 resin filter soft edge often it is necessary or desirable to balance the light intensity in one part of a scene with another this is especially true in situations where you dont have total light control as in bright contrasty landscapes sometimes it is also desireable to add colour to part of the photograph for example to add blue to only the sky lee colour graduated filters are colour toned in one half of the filter and are smoothly graduated into the cl