The Cokin Filter A138 Gradual FLW allows you to add a more natural tone to the upper or lower part of your image when shooting under warm white or white fluorescent lighting. For example, you can achieve more natural skin tones when shooting portraits.
Cokin A Series
You can use the filter with Cokin's A series mounting system and also in combination with other filters. The filters are flat and square, so they take up little space and always find a place in your equipment.