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 don't have total light control, as in bright contrasty landscapes. B&W graduated neutral density filters are gray toned in one half of the filter and are smoothly graduated into the clear portion. B&W Graduated Neutral Density filters are available in 2 grades; #501 (approx. 1 stop density at the top) and #502 (approx. 2 stops density at the top).
This filter is glass and measures 3x6" (75 x 150 mm)