Cokin P121M Gradual Grey Medium ND4 P-Series

According to the classic rules of landscape layout, the sky occupies 3/5 of the space above the line of horizon. In photography this is interpreted by major differences in luminosity between the sky and the rest of the image. Cokin P121M Gradual Neutral Grey ND4 P-Series graduated filter reduces the total amount of light reaching the film, but without affecting the colour balance. This filter will also re-balance the luminosity between the upper and lower part of a scene and the foreground/b