Kood's 67mm Dark Gray (Soft Edge) Gradient Filter for Cokin A is a gray gradient filter that reduces the brightness in the sky and helps balance the exposure between the sky and the land. This soft edge filter has a gradual thinning of the color from top to bottom.
This gray filter darkens the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. This filter has density on half of the filter surface, helping to darken skies and other bright areas of the image. The filter is most dense at the edge and tapers to clear by the middle of the filter.