According to the classic rules of landscape layout, the sky occupies 3/5 of the space above the line of horizon. In photography
...According to the classic rules of landscape layout, the sky occupies 3/5 of the space above the line of horizon. In photography
...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 & 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 & lower part of a scene & the foreground/background. With progressive graduation from the bottom to the top of the filter the P121M is the same colour but with a lighter tone than the P121.