Large Hole - Filters 70 to 78 are best from wide-angle lenses to standard lenses. The smaller will be the aperture, the sharper will the hole’s edges be, and vice-versa. The choice between the «60» and «70» series will depend on the size of the subject. Density 1
For shorter focal lengths 20-24 or 28mm as well as for wide angle zooms (24-50mm / 28-85mm / 35-135mm) the Cokin P System is strongly recommended.