With the Sunset filters, the sun sets right when you need it to and its intensity is assured! These filters allow you to intensify or simulate a realistic sunset. They excel for backlighting or silhouette effects. If, at dusk, there is little or no sunlight, this kind of filter is sure to give you a fantastic helping hand. Sunset 1 (P197) is the milder of the pair, requiring 1 stop of compensation. Cokin P Series Graduated Filter Requires P Series Filter Holder and Mount Ring for use (NOT Included)