Cokin Filter P130 Gradual emerald 1

According to the classic rules of landscape layout, the sky occupies 3/5 of the space above the line of horizon, whether real or imaginary. In photography, this is interpreted by major differences in luminosity between the sky and the rest of the image. COKIN Graduated Filters, by reducing the difference, re-balance the luminosity between the upper and lower part of the image. They put an end to disappointment from washed-out skies and underexposed landscapes.
COKIN Green Graduated: For heavy storm cumulus, heavily contrasted clouds, or to bring the colour of the sky into harmony with the dominant colour of your subject.